Okay, XOrg is still maintained then. I dont know if RHEL 9 already defaults to Wayland but can imagine not.
I agree on the points with missing support, various things, especially remote desktop, need to be adapted to switching was not easy.
Still, they are too late. These things are doable now and it is still an incomplete implementation.
I think their work is good, their desktop and apps have a clear scope and work well in that. But I wouldnt recommend it, because I dont recommend Ubuntu base, and because I think currently there are better desktops.