That's mostly because unlike Wayland and some distro devs, KDE cares for their users. They substitute missing/unfinished Wayland features with quick and dirty c

That's mostly because unlike Wayland and some distro devs, KDE cares for their users. They substitute missing/unfinished Wayland features with quick and dirty custom implementations they intend to replace after they are finalized. So Plasma is not Wayland. That said, even the bleeding edge Plasma 6 (which has the most complete Wayland support and then some) doesn't work well in Wayland mode yet, it has plenty of issues with drag-n-drop, cursors, portals, much-hyped fractional scaling, and many other things (I still can't calibrate my drawing tablet display, for example). The overall experience beyond very basic features is flaky and unfinished. I'm not even starting on implicit/explicit sync debate, that's a complete shitshow that can only be blamed on Wayland devs (regardless of Nvidia).