Numerous devs have experimented with Wayland recently and the consensus is that it's largely usable (if still a bit buggy) for Intel/AMD GPU users however Nvidia still needs a few more driver updates before it's comparable (though the situation has improved substantially already recently).
GNOME Wayland is pretty much at feature parity with X11 right now, Plasma still needs a couple of major releases IMO, can't comment on Sway or MATE. There are still some major feature limitations right now, but they're mainly app-related. Such as certain apps not supporting Pipewire screensharing and so having an inferior experience on that front (looking at you Discord and OBS).
My guess is that around the middle of the year things will have improved enough that discussions on whether to support it or not are likely to be had. Ecosystem-wise I think the release of Ubuntu 22.04 LTS will put a lot of pressure on the apps that don't support Wayland yet to fix their issues with it.
