You've moved the goalposts on this argument now. "$Thing is hard to implement on Wayland and requires quite a lot of effort by each DE"[1] is a very different argument to "$Thing doesn't work on Wayland". Pretty much everything you listed works well in Fedora with Gnome/Mutter.
If the maintainers of the DEs are happy with the effort, then I don't see a problem? (unless you're a DE maintainer, in which case - fair enough).
[1] When I first wrote this sentence I wrote "X is hard to implement" using X as a metasyntactic variable before I realised that was incredibly confusing in context!
If something requires effort from each DE / compositor to implement, it's not "implemented in Wayland", but rather Wayland does not preclude it from being implemented.
If the maintainers of the DEs are happy with the effort, then I don't see a problem? (unless you're a DE maintainer, in which case - fair enough).
[1] When I first wrote this sentence I wrote "X is hard to implement" using X as a metasyntactic variable before I realised that was incredibly confusing in context!