[pipe_connector]

I agree with the characterization of applications you've laid out and think everyone should consider whether they're working on a "tall" (most users use a narrow band of functionality) or a "wide" (most users use a mostly non-overlapping band of functionality) application.

I also agree with your take that tall applications are generally easier to build engineering-wise.

Where I disagree is that I think in general wide applications are failures in product design, even if profitable for a period of time. I've worked on a ton of wide applications, and each of them eventually became loathed by users and really hard to design features for. I think my advice would be to strive to build a tall application for as long as you can muster, because it means you understand your customers' problems better than anyone else.

[feoren]

> I've worked on a ton of wide applications, and each of them eventually became loathed by users and really hard to design features for.

Yes, I agree that this is the fate of most. But I refuse to believe it's inevitable; rather, I think it comes from systemic flaws in our design thinking. Most of what we learn in a college database course, most of what we read online, most all ideas in this space, transfer poorly to "wide" design. People don't realize this because those approaches do work well for tall applications, and because they're regarded religiously. This is why I call them so much harder.

[lll-o-lll]

> Yes, I agree that this is the fate of most. But I refuse to believe it's inevitable

Yes exactly. It is not inevitable, I’ve worked on several “enterprise” software suits that did not suffer from this problem. However! They all had that period in their history where they did, and this is why:

Early on in a companies history there will be a number of “big” customers from whom most of the revenue is coming. To keep those customers and money flowing, often bespoke features are added for these customers and these accumulate over time. This is equivalent in character to maintaining several forks of an OSS project. Long term no forward progress can be made due to all time ending up in maintenance.

The solution to this sorry state is to transition to an “all features must be general for the product” and ruthlessly enforce this. That will also mean freezing customer specific “branches” and there will be a temporary hit to revenue. Customers need to be conditioned to the “no bespoke features” and they need to be sold on the long term benefits and be brought along for the ride.

This then enables massive scaling benefits, and the end of all your time in maintenance.