I mean, to play devil's advocate here - if functionality that you need is all of a sudden swept out from under you then it doesn't matter from an end user perspective if it's not the intended design for Wayland - to the user, Wayland is broken in that regard.

A better equivalent would be if an application you used every day for the last 10 years all of a sudden has an update that kills features you used because that's no longer part of the dev(s) vision. Or headphone jacks on phones. Or whatever that weird thing with Teslas where they disabled a sensor in an OTA update and replaced it with some other solution(?).

Or to modify the example you put, if Windows killed the cmd shell and only left powershell in a Windows Update.

I have an application that I need to use at work which will never fit Wayland's design, short of me either finding a new job, keeping a Windows install around, or using a really old version of Linux around in a VM when X11 has completely disappeared from all distros (which won't really work) - there will be nothing that I can do about it on the Wayland side because it's highly unlikely the devs will update it to be compatible (since it's a shock that they actually even had Linux support in the first place).

As it is, I currently just pop into an X11 session whenever I'm on working hours, it will suck that I can't do that with Fedora come next release when they completely drop X from the repos.