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Multi-layered calendars

Traveling through time in three dimensions

01 Intro

Time is a curious thing. It’s a constantly flowing stream that can’t be paused, stopped, or repeated. We experience it, but we can’t control it. We can’t even touch or feel it.

To get a better grasp of this weird, intangible resource that governs everything around us, humanity has invented a variety of “time devices”. These devices help us to plan and optimize how we spend our time. To make the most out of the here and now.

The most popular time device is the watch. A watch is a useful tool, but its functionality is limited to the present moment. It allows us to see time, but not to manage it. It only tells us the status quo.

Calendars, on the other hand, cover the entire spectrum of time. Past, present and future. They are the closest thing we have to a time machine. Calendars allow us to travel forward in time and see the future. More importantly, they allow us to change the future.

Changing the future means dedicating time to things that matter. It means allocating our most precious resource to activities with the highest expected return on investment.

You would expect technologists and entrepreneurs to be intensely focused on perfecting such a magical time travel device, but surprisingly, that has not been the case. Our digital calendars turned out to be just marginally better than their pen and paper predecessors. And since their release, neither Outlook nor Google Calendar have really changed in any meaningful way.

Isn’t it ironic that, of all things, it’s our time machines that are stuck in the past?

The essay at hand is an exploration of what calendars could be if they weren’t stuck in time. But before we discuss their future, we first need to analyze their present status and how they fit into the rest of the productivity stack.

02 Calendars and the productivity stack

Our productivity stack consists of four types of tools:

  • Note-taking apps
    To document and organize our thoughts
  • Email
    To communicate with others
  • Task managers
    To organize the things we need to get done
  • Calendars
    To manage our time

The fact that we use four distinct tools suggests that note-taking, email, task management, and time management are four distinct activities. But when you look closer, you’ll realize that these activities are actually not that clear-cut. In fact, they all heavily overlap. Notes are just emails to your future self. Emails are just tasks. And tasks are just calendar events.

My personal workflow looks like this:

  • I treat my email inbox as my primary task manager (and note-taking tool).
  • Tasks are emails I receive from others or emails I send to myself.
  • I snooze emails until the week I want to get them done.
  • At the beginning of each week, I go through my email todo list and block time in my calendar for each task.

The email<>todo part of this workflow actually works reasonably well. Most of today’s email clients are built around the concept of Inbox Zero, which effectively turns your email inbox into a todo list with public write access.

The part we haven’t really figured out yet is the intersection between task managers and calendars.

Treating todos as calendar events is helpful because calendars introduce constraints. A calendar forces you to estimate how long each task will take and then find empty space for it on a 24 hours × 7 days grid, which is already cluttered with other things. It’s like playing Tetris with blocks of time.

So how do we get tasks into our calendars without awkwardly switching back and forth between two different apps that don’t talk to each other?

New productivity tools such as Amie are trying to solve this problem by natively inserting todo lists into the calendar experience. In Amie, every calendar event is a task that can be marked as done.

This approach is a step in the right direction, but it doesn’t go far enough. I agree that tasks should live in your calendar, but that doesn’t mean every calendar event should be a task. The way I see it, tasks are just one of many different types of calendar events. And just one of many different calendar layers.

03 Managing time in three dimensions

To make the concept of calendar layers a little more tangible, let’s look at a scenario that you have probably seen before:

What’s happening here?

1. You have a meeting with Mike
A meeting is a multiplayer calendar event. It is not the same as a task. It is simply a reminder for all meeting participants that their presence is required (or desired) at a specific time and place. There is no “to do” here apart from showing up on time.

2. You need to travel to and back from your meeting
To ensure that no other meetings are scheduled during those travel times, you added two “do not schedule” blocks (DNS). These are neither meetings nor tasks. Their only purpose is to avoid conflicts with other upcoming events.

The DNS blocks appear before and after the meeting, but what they really represent is one entire layer of time that stretches from 10:30 to 12:30. Your conversation with Mike is a meeting layer on top of your blocked time layer.

We tend to think of calendars as 2D grids with mutually exclusive blocks of time, but as this example shows, not all events automatically cancel each other out. Depending on their characteristics, they can be layered on top of each other. This means we manage time in three, not two, dimensions.

Let’s see if we can add another layer to the mix.

As discussed at the start of this chapter, neither blocked time nor meetings qualify as tasks — but what about talking points or agenda items that need to be covered in your meeting?

We are now looking at three different types of calendar events, each with their own unique set of properties. The problem is that our calendars treat all of these different events equally. They don’t natively differentiate between a task and a meeting even though they are two completely different things.

When I chatted with Cron founder Raphael Schaad about this issue, he pointed out another missing layer: Activities. An activity takes place for a prolonged period of time, but only requires your attention at certain points of it — not throughout.

Flights, for example, should be native calendar objects with their own unique attributes to highlight key moments such as boarding times or possible delays.

This gets us to an interesting question: If our calendars were able to support other types of calendar activities, what else could we map onto them?

04 Traveling back in time

A while ago, this mock-up appeared in my Twitter feed:

What’s so interesting about this idea is not just that it introduces another unique calendar layer, but that the data of this layer is rooted in the past. In contrast to traditional calendar events, all of these Spotify entries were created after they happened.

Something I never really noticed before is that we only use our calendars to look forward in time, never to reflect on things that happened in the past. That feels like a missed opportunity.

While a Spotify layer might seem more like a gimmick than a meaningful productivity hack, the idea of visualizing data from other applications in form of calendar events feels incredibly powerful. What if I could see health data alongside my work activities, for example?

My biggest gripe with almost all quantified self tools is that they are input-only devices. They are able to collect data, but unable to return any meaningful output. My Garmin watch can tell my current level of stress based on my heart-rate variability, but not what has caused that stress or how I can prevent it in the future. It lacks context.

Once I view the data alongside other events, however, things start to make more sense. Adding workouts or meditation sessions, for example, would give me even more context to understand (and manage) stress.

Sleep is another data layer that would make a lot more sense in my calendar than in a standalone app. I already block time in my calendar for sleep (mostly as a DNS-memo to coworkers in other time zones), so why not add sleep quality data directly to that calendar event?

This way I could plan my day ahead with a lot more accuracy. Fully recharged after a solid eight hours of sleep? Block more focus time. Lack of deep sleep? Add another coffee break to the agenda.

This example is particularly interesting because it leverages all of our calendar’s time travel capabilities. It allows us to shape the future by studying the past.

Once you start to see the calendar as a time machine that covers more than just future plans, you’ll realize that almost any activity could live in your calendar. As long as it has a time dimension, it can be visualized as a native calendar layer.

Most of these data layers are pretty meaningless in isolation; it’s only when we view them alongside each other that they unlock their value. Even a Spotify layer starts to make sense when you look at it in combination with stress data (which music calms me down?), productivity metrics (which music helps me focus?), or personal activities from the past (nostalgia).

05 Closing thoughts

The takeaway of this essay is twofold:

  • Calendars should natively differentiate between different types of calendar events. Tasks, meetings, blocked time, and other activities should look and behave differently depending on their respective attributes.

  • This would open the door for a virtually infinite amount of other use cases that could be integrated into the calendar experience in the form of unique calendar layers.

These changes would not just make the calendar a stronger center of gravity in the aforementioned productivity stack, but turn into an actual tool for thought, where time serves as the scaffolding for our future plans and our memory palaces of the past.

Thanks to Adam Waxman, Dennis Müller, Kevin Yien, Paco Coursey, Michael Karnjanaprakorn, and Raphael Schaad for reading drafts of this post.

Jul 06, 2023  ×  Berlin, DE

The power of defaults

Are network effects overrated?

01 Intro

The world’s most successful companies all exhibit some form of structural competitive advantage: A defensibility mechanism that protects their margins and profits from competitors over long periods of time. Business strategy books like to refer to these competitive advantages as “economic moats”.

One of the most cited types of moats is the concept of network effects. Network effects occur when the value of a product or service is subject to the number of users. A positive network effect means that a product or service becomes more valuable to its users as more people use it.

Network effects are extremely hyped and have become a bit of a meme in recent years among tech entrepreneurs, investors and policy makers. The five largest companies by market cap in the US all seem to be built on some sort of network effect and some even go so far as to claim that 70% of tech value creation since 1994 is predicated on network effects.

While network effects can indeed be very powerful, they are also one of the most misunderstood – and in many cases overrated – concepts in business strategy. Not all network effects are created equal and the most successful ones are just a means to an end.

This essay isn’t about network effects per se. It’s about the end state that they can enable: Defaults. In the next few chapters I’ll teach you how to think in layers, explain why defensibility is really about real estate, and tell you what Salesforce and Jesus have in common (got your attention now, don’t I?).

Let’s get started.

02 Theory Primer

Before we dive into it, let’s start with a super quick theory primer on network effects.

Network effects can be broadly divided into three different categories: Direct, indirect and data network effects.

Direct network effects – as the name suggests – occur when the number of users has a direct impact on the value of a product. A telephone, for example, is worthless if you are the only person who owns one. But with every additional user who joins the telephone network, the number of people you can have a conversation with goes up and therefore the overall value of a telephone increases. The same dynamic is true for chat apps, social networks and p2p payment systems.

Indirect network effects are a little more complicated. They occur in two-sided (or multi-sided) products where the size of one user group affects how valuable the product is to another user group. Operating systems are an often cited example here: The more users an OS has, the more attractive it becomes for developers. More developers and apps, on the other hand, make the platform more valuable for users, thereby generating a positive feedback loop between the two sides.

The third category, data network effects, describes products which become better with more users via the data those users generate. Waze is a popular example of this category as are products that are powered by machine learning. More users lead to more data which lead to better recommendations or predictions and, thus, a better user experience.

There are two other concepts I would like to briefly introduce you to: Switching costs and multihoming costs. Switching costs describe how difficult or expensive it is for a user to switch from one product to another, whereas multihoming costs explain how easy or likely it is to use multiple competing networks simultaneously.

Both of these costs are not necessarily monetary – they can also be psychological or time/effort-based. The higher the switching and multihoming costs, the more defensible a network typically becomes.

What gets people so excited (or worried) about network effects is not just their defensibility though. It’s the idea of reinforcing feedback loops and the resulting exponential growth that they enable. As any paper or blog post about the topic will point out, network effects create winner-take-all-dynamics where only one or two firms end up dominating an entire industry and can’t be challenged.

But is that actually true?

03 Are Network Effects Overrated?

I have studied multiple network effect businesses for this essay and two things struck me.

First of all, it feels like many of the prototypical network effect companies are not as defensible as the literature suggests.

Take social networks, for example. Friendster‘s network effects weren’t strong enough to fend off MySpace. And MySpace – which many feared would dominate the internet forever – was quickly replaced by Facebook.

Today, Facebook is seen as the prime example for the power of network effects – and yet, one wonders where Facebook would be had it not acquired Instagram back in 2012. People also seem to forget about all the other social apps which Facebook has bought and subsequently shut down over the years. Why would a company that has supposedly “won the market” spend hundreds of millions of dollars to acquire smaller competitors?

Facebook and Instagram are also hardly the only social networks out there. Twitter, Reddit, YouTube, TikTok et al. all seem to be doing just fine. Are there no winner-take-all dynamics in social?

There is a similar pattern for chat apps: WhatsApp, iMessage, Telegram, Facebook Messenger and Snapchat all have at least 100 million users. Why doesn’t the market tip in favor of one or two of them as the literature suggests? Looking at the speed at which some of these apps have grown, one has to ask if network effects don’t perhaps have the exact opposite effect: Maybe they are not a defensibility mechanism for incumbents but a growth mechanism for new market entrants?

Another often cited network effect example is Google Search. Data network effects have made Google the best search engine on the planet. With each additional search query, Google’s algorithms become a little bit smarter and its search results better – which in turn attracts even more users and usage. This positive feedback loop makes Google unstoppable … and yet, Google pays Apple $15bn per year to remain the default search engine on iOS. Isn’t this a bit of a narrative violation?

Now, I’m not arguing that Facebook and Google aren’t extremely powerful companies. They clearly are. But I’m not convinced that their power is really based on network effects. Network effects might have helped them to get to where they are today, but their defensibility lies somewhere else.


The second thing that I found interesting hit me when I looked at examples of industries that had indeed achieved winner-take-all (or winner-take-most) dynamics:

  • Telephone
  • Railroads
  • VHS
  • Smartphones
  • QWERTY keyboards

If you study the list closely, you’ll notice that these businesses all have something in common. Something that the before-mentioned industries don’t have. They are based on atoms, not just bits.

Why is that important?

In contrast to bits, atoms have marginal costs. You can copy and paste a piece of software at virtually zero cost, but producing an additional piece of hardware has all sorts of marginal costs associated with it (material, production, shipping, …). This means that atom-based network effect businesses have switching and multihoming costs.

If you want to switch from Android to iOS (or use both OSs simultaneously) you have to spend at least a few hundred dollars on a new iPhone. Software, on the other hand, is typically free to use, so switching to a new chat app, social network or search engine doesn’t come with a real price tag. Because of their marginal costs, atom-based businesses have a greater lock-in effect and thus defensibility.

Another under-appreciated aspect that makes multihoming less likely is that atom-based products have physical space constraints. You can’t have eight competing rail road networks because there simply isn’t enough real estate to build them. Similarly, most consumers wouldn’t be willing to carry around more than one smartphone with them. Your pockets also have limited real estate.

Software businesses don’t face this type of scarcity. You can install as many apps on your phone as you want. Bits make multihoming less expensive and less inconvenient.

So does that mean that network effects are only an effective moat for atom-based products and services?

Not quite, but you’ll see why the bits vs atoms distinction matters once you start to think in layers.

04 Thinking in Layers

You may have heard about the concept of “value chains” before. Value chains are horizontal visualizations of all the value-adding business activities involved in creating a product or service from start to finish. They are great to analyze traditional businesses and industries but they are not a very useful framework for tech companies.

If you want to understand the power dynamics between different platforms, aggregators and other players in a tech ecosystem, it’s better to look at them as a vertical stack with different layers.

On each layer of the stack, companies are trying to create value and to capture value. The lowest layers of the stack are typically the most powerful. If you are able to take control of a layer, you can dictate the terms of most of the value creation and value capture that is happening in the layers above you.

As a result, you see companies trying to

create layers on top of their business (everyone wants to be a platform) move down the stack to get closer to the base layer (to increase defensibility)

What is the base layer?

The base layer is the final interface between the stack and the end user – which is typically an operating system tied to a piece of hardware. This is why atom-based network effects are so powerful: They help companies gain control of the most powerful layer of the stack.

Let’s work through a few examples to make this concept a little more tangible.

05 The Google Stack

Google started as a simple website that allowed users to search other websites. Thanks to the superiority of its PageRank algorithm, more and more users started using Google Search, resulting in better search results and thus in even more users switching over to Google Search.

Thanks to this powerful data network effect, Google was able to move down the stack. Google wasn’t “just a website” anymore, it became an aggregator that commoditized all other websites and made them layers on top of Google’s.

The data network effect, however, is not the real moat here. It’s just a means to an end. The end goal is to become a default on the layer below.

Let’s go back to atom-based network effects real quick. Earlier, we identified that they have two significant characteristics:

  • Marginal costs (resulting in high switching & multihoming costs)
  • Space constraints (resulting in high multihoming costs)

As we discussed, software doesn’t have marginal costs. The fact that you can copy and paste software at virtually zero cost has led us to a world of abundance where many things are free and infinitely available.

But what about space constraints?

Your initial reaction might be that software doesn’t have space constraints. We are talking about bits here, after all, not atoms. But if you look closely, you’ll notice that that’s not really true. Every layer in the stack has some sort of limited (pixel) real estate – and in a world of abundance, that scarce resource is extremely valuable.

Okay, back to the Google example.

If Google wants to become a default on the layer below the search engine, it must find and occupy limited real estate on the browser layer. There are billions of websites out there … but only one default: Your browser homepage.

Becoming the default browser homepage became Google’s actual moat. There can only be one homepage (no multihoming) and users are typically too lazy to change it (friction = switching costs).

As you well know, Google didn’t stop there. It moved down the stack and successfully conquered the browser layer with Google Chrome – which obviously shipped with Google Search as the default search engine. More importantly, it turned the address bar into a search box thereby melting the browser and the search engine into sort of one layer.

With Android – one of the most underrated acquisitions of all time – Google then moved even further down the stack. It now owns a significant chunk of the world’s most important base layer: the smartphone operating system. Unsurprisingly, Android ships with Chrome and Google Search pre-installed.

If you think about it, it’s kind of amazing that the largest operating system humanity has ever seen only exists to protect an advertising business two layers further up the stack.

Unluckily for Google, smartphone operating systems are not winner-take-all but winner-take-most markets. Not only does Apple have considerable market share in the smartphone market, its user base is significantly wealthier and thus more interesting to advertisers.

06 The Apple Stack

Apple is an interesting case study because its stack strategy has been so reciprocal to Google’s. It started with the base layer and then worked its way up the stack.

The first iPhone was released in 2007, but only in 2008 did the company launch the App Store. Opening up iOS to third-party developers created a new layer above the operating system: apps.

The apps layer is interesting because it created indirect network effects between developers and users, which added defensibility to the OS layer. That defensibility in turn meant that Apple was able to capture a lot of the value that was created on top of its platform. 30% to be exact.

30% value capture is great, but you know what’s even better?
100% value capture.

Over the last couple of years, Apple has increasingly launched and monetized its own apps (and services) on top of iOS. It has moved up the stack and is now competing with the third-party developers on its own platform.

In contrast to third-party apps, however, Apple’s own apps come pre-installed. They are defaults.

Apple realized that it owns some of the most valuable pixel real estate in tech: The home screen. And the best way to monetize that real estate is by occupying as much as possible of it yourself.

The beautiful thing about defaults is that they beat almost any competing product – even if that competitor has strong network effects or is technically superior.

This is why Apple Maps has higher market share than Google Maps, why Apple Music is able to catch up with Spotify, and why Google pays Apple $15bn a year to remain the default search engine on Safari.

(I can already hear the Apple fan boys furiously typing. No, these apps aren’t pre-installed to create a better user experience. No, Apple Music is not a better product than Spotify. No, “privacy” is not a convincing argument that explains Apple Maps’ high market share.)


It’s important to point out that not all of Apple’s default apps exist to increase value capture. That might be true for Apple News, Apple Arcade and Apple Fitness, but clearly not for apps like Maps or Health. So why do those exist?

Some of them add stickiness and switching costs to the iOS platform. iMessage, for example, creates network effects that make it harder for users to switch to a competing OS layer like Android.

Other default apps – like Maps – are solely there to mitigate risk from upper layer apps that might become too powerful. You’ll remember from the Google case study that Search became synonymous with the browser. And that the browser became the real operating system on desktop computers. That’s a scenario Apple wants to avoid at all cost. So instead of taking the risk that a service like Google Maps or Spotify becomes too dominant and threatens the base layer, Apple will launch its own (default!) maps and music apps.

This also explains why Apple doesn’t allow any competing app stores, browser apps (that aren’t built on WebKit) or game streaming services. Users are also not able to add 3rd-party apps to their iOS lock screen, change their default camera app or give quick access to a payment app other than Apple Pay. All of these limited real estate defaults are fully in Apple’s grip.

Apple Pay and Wallet are particularly important for Apple because they are tied to the user’s identity – which is another important layer in the stack.

07 The Identity Layer

So far, the layers we have looked at were all pretty distinct. The Google and Apple stacks we analyzed are simply different platforms and applications that build on top of each other. But not all layers are distinct pieces of software. Some layers are blurry and don’t have a clearly marked place in the hierarchy of the stack. One of those layers is the identity layer.

Earlier in this essay, we described the base layer of the stack as “the final interface between the stack and the end user”. Operating systems like iOS or Android are great examples because there are no other layers between the smartphone and the end user.

But what if the end of the stack isn’t an interface? What if the lowest possible layer in the stack is actually the user itself?

Identity is a crucial component of almost every single layer in the stack – especially if that layer is a network (which most layers are). Every network is just a collection of nodes and if you want to build connections between those nodes you need an identity layer. Even in a pseudonymous network, each user has a consistent identifier.

The fascinating thing about identity is that it’s kind of a stack of its own. When you sign up to a new app or service, you almost always use an existing identity. Until recently, that identity was typically your email address or phone number. Both email and phone numbers are great base layers for online identity because they are (sort of open) standards.

Unsurprisingly, in their attempts to become defaults, other companies have tried to create their own identity base layers. One of them is Facebook.

Facebook is a typical network effect business: The value to its users grows as a direct result of attracting more users. On top of the core social network there are several other network effect loops including Messenger (direct network effects), Newsfeed (data network effects) and Marketplace (indirect network effects).

Facebook’s real stickiness, however, comes from another network effect. One that allowed the company to move a layer down the stack: Facebook Login

Facebook Login is a single sign-on service (SSO). It allows people to sign up to other social platforms and services using their Facebook account. SSO is more convenient for users and thus promises greater sign-up conversion rates for 3rd-party platforms. The more people use Facebook Login, the more platforms will offer it, thereby increasing the total number of accounts that a single user has connected to their Facebook identity.

As a result, it becomes really difficult *not* to use Facebook. In contrast to Google and Apple, Facebook doesn’t own an operating system and, thus, doesn’t enjoy the defensibility of a pre-installed default. But because Facebook is the de-facto online identity layer for so many people, it is almost guaranteed to secure some of that limited pixel real estate on the user’s home screen.

Unsurprisingly, Facebook is not the only company trying to become the default identity layer – dozens of companies are. Which brings us to the question of “winner-take-all-dynamics” and defensibility in the identity stack.

We started this essay with the observation that neither social networks nor messaging apps have tipped in favor of just one or two winning companies despite the strong network effect dynamics in these verticals. Interestingly, both of these product categories are also very closely tied to identity.

Instead of winner-take-all-dynamics, we are seeing not just multiple identity aggregators (SSO services) but – more importantly – many, many different identity networks building on top of them. When you sign up to a new social app using Facebook Login, your (pretended) identity in this new social app is most likely going to be distinct from your Facebook identity – which is probably the reason you are signing up to a new social service in the first place.

As I wrote in Is This Real Life?, identity is not monolithic but prismatic. Who you are on Facebook is different from who you pretend to be on TikTok. Your real name LinkedIn persona is not compatible with the pseudonymous identity you use on fringe Discord channels to shill shady new NFT projects. Google+ Circles and Facebook Lists always got this wrong: They let us change who we shared with, but not who we shared as.

As a result, we see intense multihoming in the online identity stack. There might be clear winners in certain verticals (e.g. LinkedIn for “professional networking”), but “social” as a whole is not a winner-take-all market.

That changes once we start to move down the stack and get closer to the base layer.

Like in previous examples, multihoming becomes less likely the closer we get to the world of atoms.

Your various different online identities on the top of the stack get bundled in a handful of identity aggregators. Most online services don’t offer more than three or four different SSO options because – you guessed it – there is limited pixel real estate in the sign-up flow.

Chances are you don’t actively use more than two different email addresses (one for work, one for personal life). Your phone number is directly tied to a physical device which makes multihoming unlikely because of the aforementioned multihoming costs and physical space constraints.

Once we get to the base layer of the stack – your real life identity – multihoming becomes virtually impossible. Unless you are Jason Bourne or suffer from severe schizophrenia, you only have one identity in real life.

The most interesting identity defaults to occupy are therefore all the interfaces between your real world identity and your digital self. For example, your driver’s license (see Apple Wallet), your payment details (see Apple Pay), or your medical records (see Apple Health).

All of these touchpoints represent sources of truth – which brings us to the last but most important kind of network effect default: Intersubjective realities.

08 Intersubjective Realities

If you have ever worked in a revenue organization, there’s a good chance that you have heard the following sentence before: “If it’s not in Salesforce, it doesn’t exist”

It’s like “pics or it didn’t happen” but for sales people. A Salesforce entry is a timestamped proof point that a customer interaction or sales deal has actually taken place. It makes Salesforce an important source of company data. A system of record.

Salesforce is of course not the only available data source within a company. There are dozens of internal BI dashboards, spreadsheets and third-party software tools that track customer and revenue data. All of them are accurate in their own unique way, but they all tell you something slightly different.

A company can have multiple sources of data, but it can’t have multiple sources of truth. There is no multihoming on the truth layer. You need a *single* source of truth. A default.

Salesforce is not more accurate than any of the other company data sources. It is not objectively better. But it becomes intersubjectively better if enough people agree that it should be the single source of truth.

“If it’s not in Salesforce, it doesn’t exist” is a reinforcing flywheel. A social network effect. The more people believe in it, the truer it becomes.

This is Salesforce’s core defensibility. You can replace a CRM system, but can you replace “the truth”?


Intersubjective realities like being the default source of truth are not just intra-company network effects.

For many decades, a popular intersubjective reality was that “nobody ever got fired for buying IBM”. Salesforce feels like the 2021 version of that belief – and they are not the only company that fits that description.

I sometimes joke that every time I open Workday I’m reminded that we live in a simulation. Because getting to a $50bn+ valuation with a product as horrible as Workday’s is the best example we have of a glitch in the matrix.

Kidding aside, Workday’s real moat is, of course, the same as Salesforce’s and IBM’s. Nobody ever got fired for buying Workday. It’s the default HR tool of choice.

What’s so striking about these examples is the discrepancy between market cap and NPS score. It would be amazing if we lived in a world where companies with terrible UX did badly in the stock market, but that is clearly not the case. The fact that you can build a successful business without a truly great product is a real testament to how strong of a moat belief-based defaults really are.

Of course, intersubjective realities don’t just lead to suboptimal product defaults like Salesforce or Workday. These are just extreme edge cases to prove my point. Most of the default software products of today (think AWS, Stripe, Notion) became defaults because their products are just really good. But even great products need shared beliefs to become defaults.

Beliefs are the world’s most powerful network effects. They don’t just explain the success of software products. The price of Bitcoin, democracies and dictatorships, capitalism, and the power of the church are all based on intersubjective realities. No moat is more durable than a shared belief.

Jesus turned water into wine – but Salesforce turns shit into gold.

See, the real base layer of the stack isn’t an interface. And it’s not our identity either. It’s our collective minds.

Like other defaults we analyzed in this essay, intersubjective realities are able to capture a scarce piece of real estate. The most valuable real estate there is: Mind space.

09 Closing Thoughts

So where does this essay leave us?

Some people will say that I oversimplified some network effect concepts and that a couple of my arguments are pretty speculative.

They are not wrong.

I very deliberately downplayed the importance of certain network effects and took a few shortcuts to make the narrative work. But as I pointed out at the beginning, this post isn’t really about network effects. It’s about thinking in layers.

This essay doesn’t end with a definitive answer to the “Are network effects overrated?”-question, because there is none. Some are overrated. Some are underrated. Some are rated just right. It really depends on where in the stack you are.

Some people will say that this essay is a missed opportunity: “How can you write this essay without mentioning crypto even once?”

They are not wrong.

Decentralized protocols would make very interesting base layers and I’m particularly excited about web3 in the context of identity. Does crypto solve the problem of suboptimal defaults? Well, that’s a different question and I’m honestly not sure. Just because you have decentralized base layers doesn’t mean you won’t see centralization, aggregation and default rent seeking on top of them – no matter how you design them. Greed is like water: It always finds a way through.

I haven’t written about crypto in this essay because I’m still trying to wrap my head around it. It probably deserves a post of its own at some point.

Some people will say that intersubjective realities aren’t real network effects. They’ll say that I’m stretching the definition of network effects too far.

I think they are wrong.

I understand that the idea of social network effects is even more intangible and immeasurable than the already vague concept of “traditional” network effects – but it still surprises me how many people refuse to see beliefs as what they are. Not only do I think that beliefs are network effects, I think they are probably the most important and most defensible of them all. Perhaps this intersubjective reality just hasn’t reached its critical mass yet.

Some people will agree or disagree with other ideas in this essay. If you are one of them, I’d love to hear from you.

Thanks to Behzod Sirjani, Max Cutler, and Sameer Singh for reading drafts of this post.

Dec 20, 2021  ×  Berlin, DE

Media Consumption (Apr 2021)

>_ Summary
  • Read 4 books (671 min, -60% MoM) and 33 articles (-23%)
  • Listened to 613 songs (+3%) and 11 podcasts (704 min, -6%)
  • Watched 6 movies (752 min, +199%), 12 soccer games (1395 min, +105%) and 0 TV episodes (0 min, -100%)
  • Played 1 board game (50 min, + ∞) and 0 video games (0 min, same)
>_ Books

The Human Use of Human Beings (Norbert Wiener)
░░░░░░░░░▓▓▓▓▓▓ Progress: 61-100%

Titan: The Life of John D. Rockefeller, Sr. (Ron Chernow)
░▓▓▓░░░░░░░░░░░ Progress: 1-27%

The Humane Interface (Jef Raskin)
▓▓▓▓▓▓▓▓░░░░░░░ Progress: 0-56%

First Person Singular (Haruki Murakami)
▓▓▓▓▓▓▓▓▓▓▓░░░░ Progress: 0-71%

>_ Recommended Articles

Why You Are Christian (David Perell)

Prospectus On Próspera (Astral Codex Ten)

>_ Music

Top Artists: Hans Zimmer (44 plays), Rin’ (43), Sufjan Steven (43), Kynda Gray (30), Kanye West (28)

(Click here to learn how I conduct these quantified self reports)
May 03, 2021  ×  Berlin, DE

Media Consumption (Mar 2021)

>_ Summary
  • Read 6 books (1664 min, -24% MoM) and 43 articles (+95%)
  • Listened to 596 songs (+64%) and 17 podcasts (747 min, -.3%)
  • Watched 2 movies (251 min, -72%), 5 soccer games (680 min, -30%) and 15 TV episodes (944 min, +133%)
  • Played 0 board games (0 min, same) and 0 video games (0 min, -100%)
>_ Books

Thinking in Systems (Donella H. Meadows)
░░░░░░░░░▓▓▓▓▓▓ Progress: 62-100%

My Struggle (Book 1) (Karl Ove Knausgård)
░░░░░░░░░▓▓▓▓▓▓ Progress: 62-100%

Klara and the Sun (Kazuo Ishiguro)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

A Gentleman in Moscow (Amor Towles)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

The Human Use of Human Beings (Norbert Wiener)
▓▓▓▓▓▓▓▓▓░░░░░░ Progress: 0-61%

Titan: The Life of John D. Rockefeller, Sr. (Ron Chernow)
▓░░░░░░░░░░░░░░ Progress: 0-1%

>_ Recommended Articles

Noah Smith interviews Patrick Collison (Noahpinion)

You merely adopted dark mode (Jonathan Libov)

You Can’t Kill the Bloomberg Terminal. But If You Were Going to Try, Here’s How. (Byrne Hobart)

>_ Recommended Podcasts

What If? (The Rest is History)

Kanyi Maqubela – Dawn of the 21st Century (Invest Like the Best)

>_ Music

Top Artists: Hans Zimmer (96 plays), Slut (38), Sufjan Steven (31), Element of Crime (29), Bloc Party (25)

(Click here to learn how I conduct these quantified self reports)
Apr 02, 2021  ×  Berlin, DE

Media Consumption (Feb 2021)

>_ Summary
  • Read 3 books (2202 min, -10% MoM) and 22 articles (-15%)
  • Listened to 364 songs (+38%) and 15 podcasts (749 min, same)
  • Watched 8 movies (885 min, +727%), 7 soccer games (965 min, +16%) and 7 TV episodes (405 min, -62%)
  • Played 0 board games (0 min, same) and 1 video game (120 min, +380%)
>_ Books

Albert Speer: His Battle with the Truth (Gitta Sereny)
░▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 9-100%

Thinking in Systems (Donella H. Meadows)
▓▓▓▓▓▓▓▓▓░░░░░░ Progress: 0-62%

My Struggle (Book 1) (Karl Ove Knausgård)
▓▓▓▓▓▓▓▓▓░░░░░░ Progress: 0-62%

>_ Recommended Articles

Creeping as a Service (Fadeke Adegbuyi)

Concept: Some ways Apple can avoid antitrust concerns (9to5Mac)

Apple, Its Control Over the iPhone, The Internet, And The Metaverse (Matthew Ball)

NFTs and a Thousand True Fans (Chris Dixon)

>_ Recommended Podcasts

An Interview with Eric Seufert about Apple, Facebook, and Mobile Advertising (Stratechery Podcast)

>_ Music

Top Artists: Daft Punk (28 plays), Keane (25), Mikel (15), Imogen Heap (14), Arctic Monkeys (13)

Mar 04, 2021  ×  Berlin, DE

Media Consumption (Jan 2021)

>_ Summary
  • Read 11 books (2456 min, +111% MoM) and 26 articles (-46%)
  • Listened to 263 songs (-59%) and 15 podcasts (749 min, -43%)
  • Watched 1 movie (107 min, -54%), 7 soccer games (835 min, -.6%) and 21 TV episodes (1079 min, +40%)
  • Played 0 board games (0 min, -100%) and 1 video game (25 min, -50%)
>_ Books

Working in Public (Nadia Eghbal)
░░░░░░░▓▓▓▓▓▓▓▓ Progress: 49-100%

Sharks in the Time of Saviors (Kawai Strong Washburn)
░░░░░░░░░░░░░▓▓ Progress: 84-100%

Breasts and Eggs (Mieko Kawakami)
░░▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 16-100%

Belt and Road (Bruno Maçães)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

Atomic Habits (James Clear)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

The Outsiders (William N. Thorndike Jr.)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

Creative Selection (Ken Kocienda)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

The Shortest History of Germany (James Hawes)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

Earthlings (Sayaka Murata)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

Platform Revolution (Parker, Van Alstyne, Choudary)
▓▓▓▓░░░░░░░░░░░ Progress: 0-24% (stopped reading)

Albert Speer: His Battle with the Truth (Gitta Sereny)
▓░░░░░░░░░░░░░░ Progress: 0-9%

>_ Recommended Articles

Notes on technology in the 2020s (Eli Dourado)

The Roleplaying Coup (Bruno Maçães)

Welcome to the Government-IT Infrastructure Complex (Albert Wenger)

Why can’t I write code inside my browser? (Tom Critchlow)

Still Alive (Scott Alexander)

Frameworks v0.1 (Chris Paik)

>_ Recommended Podcasts

Noubar Afeyan on the Permission to Leap (Conversations with Tyler)

>_ Music

Top Artists: Abel Korzeniowski (11 plays), Paul Kalkbrenner (11), Tame Impala (9), Travi$ Scott (9), Muse (8)

Feb 01, 2021  ×  Berlin, DE

Media Consumption (Dec 2020)

>_ Summary
  • Read 5 books (1164 min, +15% MoM) and 48 long-form articles (+200%)
  • Listened to 639 songs (+43%) and 23 podcasts (1321 min, +148%)
  • Watched 2 movies (232 min, -56%), 8 soccer games (840 min, -15%) and 16 TV episodes (771 min, -25%)
  • Played 3 board games (895 min, +∞%) and 1 video game (50 min, +∞%)
>_ Books

Blood and Oil (Bradley Hope & Justin Scheck)
░░░░░░░░░░▓▓▓▓▓ Progress: 64-100%

Breasts and Eggs (Mieko Kawakami)
░▓░░░░░░░░░░░░░ Progress: 6-16%

Working in Public (Nadia Eghbal)
░░▓▓▓▓▓░░░░░░░░ Progress: 12-49%

City of Gold (Jim Krane)
▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ Progress: 0-100%

Sharks in the Time of Saviors (Kawai Strong Washburn)
▓▓▓▓▓▓▓▓▓▓▓▓▓░░ Progress: 0-84%

>_ Recommended Articles

Stripe: Platform of Platforms (Stratechery)

Fundraising for Space Elevators (Daniel Gross)

Tobi Lütke (The Observer Effect)

Platforms, bundling and kill zones (Benedict Evans)

Shigeru Miyamoto Wants to Create a Kinder World (The New Yorker)

Endnotes on 2020: Crypto and Beyond (Vitalik Buterin)

Washington’s Secret to the Perfect Zoom Bookshelf (Politico)

The Last Question (Isaac Asimov)

The Fable of the Dragon-Tyrant (Nick Bostrom)

>_ Recommended Podcasts

Metamuse Podcast
↳ No particular episode recommendation, I found all of them super interesting.

Sam Hinkie – Find Your People (Invest Like the Best)

>_ Music

Top Artists: Sufjan Stevens (35 plays), Billie Eilish (33), Max Richter (28), Charlie Parker (24), Radiohead (21)

Jan 02, 2021  ×  Berlin, DE

List of Goals and Rules for 2021

  • Publish 6 long-form essays
    ↳ Instead of publishing a new post each week, I want to focus on six in-depth essays this year. Quality over quantity.
  • ████ ██ █████ ██ ████ ██████
  • Read 20 books
    ↳ You can follow my progress here
  • Go for a swim at least once per week
    ↳ If covid rules allow it
  • Back exercise at least every second day
  • Get back into running
    ↳ Exact systems & goals TBD
  • █████ ████ ████
  • ███████ ██ ██ ████
  • ████████
  • Conduct a 2021 Quantified Self project
  • Finish work on Julian OS
    ↳ This is a Notion dashboard that complements my QS Airtable setup.
  • ██████ █ ███ ████ ████ █ ███ ██ █████
  • Finish work on my personal uniform
  • ██ ██ █ █████████
  • Visit 1 country I haven’t been to before
  • Keep exploring more new places
    ↳ 25% of my Swarm check-ins should be places I’ve never visited before
  • Have an in-depth conversation (60 min +) with 25 interesting people I have never met before
  • Meet 50 Stripes I have never talked to before
  • Limit meat consumption to 24 meals
  • Limit alcohol consumption to weekends / time off from work
  • ██ █ ██ ██████ ██████
Jan 01, 2021  ×  Berlin, DE

Review of my 2020 Goals

I set myself 24 goals for this year and completed 9 of them (38%), which is a significantly lower success rate compared to my 2019 and 2018 lists (60% and 56%, respectively).

  • Publish 52 blog posts ❌
    This was my number one goal for this year and even though I ended up publishing only 39 posts, I managed to make writing a weekly habit. Starting to write on a regular basis has been one of best decisions I’ve ever made. Over the last 366 days, my essays have been read by more than 100,000 people, my Twitter follower base grew by more than 10x and I’ve met so many incredible and interesting people in the process. The internet is amazing.
  • █████ ██ ███████ ██ ███ ✅
  • Read 20 books ✅
    Ended up reading 21 books. The Glass Hotel was the best fiction book I read this year, History Has Begun was my favorite non-fiction book.
  • Watch less TV ❌
    I spent more than 160 hours watching TV this year – up more than 28% YoY. I blame the pandemic. And The Sopranos.
  • Swim a total distance of 120km ❌
    Due to covid-19 I only managed to swim 72 kilometers this year.
  • Go for a swim at least once a week ❌
  • Back exercise every second day ✅
    Did my exercises on 59.29% of all days.
  • ██████ ████ ████ ❌
  • ████████ ████ ❌
  • ██ ████████████ ❌
  • Ship a redesign of this blog ❌
    Still playing around with different mock-ups.
  • Finish work on my daily uniform ❌
  • Conduct a 2020 Quantified Self Project ✅
  • Publish my 2019 Quantified Self Report before end of Jan ❌
    Didn’t find time to do this.
  • Limit meat consumption to 24 days ✅
  • No alcohol if I have to work the next day ✅
    My beer consumption decreased by more than 69% and I had 13% less cocktails. I had a few more glasses of wine though (+31%)
  • Visit 1 country I haven’t been to before ❌
  • Explore more new places ✅
    I measure this in form of Swarm check-ins at locations I haven’t been to before. My goal for this year was to make every 4th check-in a new place (25%). I ended up at a 26% rate.
  • Build a Personal CRM system ✅
    While I didn’t do what I originally set out to do (building a CRM system myself), I found a pretty good solution in Clay, which does pretty much exactly what I was looking to build.
  • Keep phone screen time below 1h per day ❌
    This was a way too ambitious goal.
  • Meditate 1h per week ❌
  • Do a 3 day silent retreat ❌
  • █████████ ████ ████████ ❌
  • ██████████ █ ✅
Dec 31, 2020  ×  Berlin, DE

Thoughts on Clubhouse

Today marks the 77th day since I got onboarded to Clubhouse.

Clubhouse, for those not familiar with it, is essentially an audio-first social network. It’s kind of a mix between Reddit and a podcast. An interactive radio show. The app lets you jump into different chat rooms and participate in – or just listen to – live audio conversations around different topics.

It’s an exciting product.
And yet, in these last 77 days, I have actively used Clubhouse exactly three times.

The problem with Clubhouse is that you can only listen to conversations live as they happen. Given that the majority of the current user base is in North America, the most interesting conversations usually happen in the middle of the (European) night when I’m asleep.

The first thing I see on my phone after I wake up are a handful of Clubhouse notifications telling me about the all the interesting conversations I missed. I wish I could just download these conversations as podcasts and listen to them later.

Some have pointed out that the live nature of Clubhouse is exactly what makes it so special, comparing it to the ephemerality of Snapchat. And while I disagree on the Snapchat comparison (ephemerality ≠ synchronous creation and consumption), I do think it makes sense for Clubhouse to find its own native format rather than compete with podcasts directly.

While Clubhouse feels like live podcasts at the moment, I think over time it will probably evolve into something else. Something more unique.

The current state of Clubhouse reminds me of the early days of Twitter: People knew it was a unique new form factor, but they didn’t know how to use it yet. Most tweets were just short status updates. It took some time until the platform found its current form and use cases.

One of those use cases is “Twitter as a second screen”: Live commenting TV shows and sports events. I strongly suspect that this will become one of Clubhouse’s main uses cases as well.

As I pointed out in Airpods as a Platform, I see audio primarily as a secondary interface: You listen to music while you’re working out, for example. You consume podcasts while you are driving or commuting. You talk on Discord while you’re playing a game.

Audio is a medium that supports and augments other activities.

So instead of thinking about whether Clubhouse should make conversations available as downloads, a perhaps more interesting question is what activities could best be augmented with live audio? What does Clubhouse as an audio layer for other content look like?

The most obvious use case seems to be sports (and other events that have to be consumed live). I would love to replace the audio track of my TV sports broadcasters with a select group of (Clubhouse) experts whose opinions I’m actually interested in.

I wonder what other events or activities this would work for.
Do you have any ideas?

Dec 21, 2020  ×  Basel, CH
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