Wayland seems ready to me but the main problem that many programs are not configured / compiled to support it. Why is that? I know it’s not easy as “Wayland support? Yes” (but in many cases adding a flag is enough but maybe it’s not a perfect support). What am I missing? Even Blender says if it fails to use Wayland it will use X11.
When Wayland is detected, it is the preferred system, otherwise X11 will be used
Also XWayland has many limitations as X11 does.
Plasma didn’t deprecate X11. Though some developers hinted that the Xorg session will probably be dropped before Plasma 7 and before Qt drops X11. But nothing concrete.
Oh indeed not deprecated, my bad. Wayland is default and “preferred” (how they’re deciding what to prefer I can’t imagine), and X11 is confirmed to be removed in a future release.