Imagine if web browsers all had mutually incompatible DOM implementations for basic functionalities.

That's the situation with Wayland that people are complaining about. I don't need innovation in keyboard and mouse sharing, I need it to work.

I mean, at least with web browsers they usually converge on a common spec eventually, and most of the time you just have a bit stupid repetition in your CSS for a bit. Wayland compositors seem to be actively against this kind of process.

It's a very forced comparison trying to swap in the web's security model, where one runs untrusted code from arbitrary third parties automatically, for a personal desktop computer context where a single user is in complete control.

If anything, Wayland is designed for closed appliances. The free software ecosystem does not need to distrust applications.