> * Functioning Wayland support on anything outside of GNOME (common retort: we do not need Wayland.)

That might be the common retort but according to this opinion piece there's more going on:

https://news.itsfoss.com/wayland-core-protocol-issue/

If you accept that opinion piece then it's more that Wayland doesn't need anything but GNOME. KDE and others have been working hard to function well on Wayland and have made decent progress while still offering new features (like fractional scaling) given that they weren't really a consideration when Wayland started.