> With its "wayland-only" future it will leave behind several linux users.

This is so sad. Something like this already happened two decades ago - when GNOME 3 arrived, and KDE 4 - rough times, things broke and I had to do some distro (and DE) hopping - before settling again. Whenever you start to see a project mature and stable enough in Linux land, maybe even starts to gain unexpected traction, soon somebody decides it's time to "move fast and break things".

I sincerely hope KDE reconsiders X11 support; IIRC they proposed to keep it if the community showed still enough interest. Of course maintaining a dual stack requires double the effort, but if funding comes in, come on, maybe there's enough resources to keep X11 support alive - if feature freezed - a couple years more. There's still a few rough edges around Wayland that prevent me and others to switch.