Honestly, Windows isn’t ready for the desktop, either, it’s just not ready in a different way that most people are familiar with.

Things like an OS update breaking the system should be rare, not so common that people are barely surprised when it happens to them. In a unified system developed as one integral product by one company there should be one config UI, not at least three (one of which is essentially undocumented). “Use third-party software to disable core features of the OS” shouldn’t be sensible advice.

Windows is horribly janky, it’s just common enough that people accept that jank as an unavoidable part of using a computer.

Not everyone needs to talk to everyone. But many people need to talk to many people.

Microsoft had to abandon the initial Vista project and start over because they couldn’t manage a team of 1000 developers. People working on adjacent features had to go through so many layers of management that in some cases the closest shared manager was Bill Gates. For something like getting a change in the shutdown code reflected in the shutdown dialog.

Huge teams become exponentially harder to manage efficiently.