FWIW, it is my understanding that XWayland is still supported, so it's not like your apps will stop working.
Also there needs to be an alternative for (or patch to) simplescreenrecorder that works under Wayland. I don't want use a complex thing like OBS to make a quick demo video to demonstrate something for a co-worker and stuff.
OBS Studio still works fortunately.
Applications generally work through XWayland. Accessibility and automation tools do not.
So I'm very skeptical of the coreutils rewrite. In the current state it's incomplete, slower (not optimized), and replacing all GPL code with MIT/BSD code also feels strange to me.
Just so I'm clear: I still think it's too early to drop X11 support (even though Wayland has been basically fine for me for a long time).