Plasma/Wayland Known Significant Issues[1]
No ability to save and restore positions of native Wayland windows
Real-fake-session-restored apps don't remember which virtual desktop their windows were on
No full-screen aspect ratio correction
"Spare Layouts" feature not implemented
"Per-application Keyboard Layout" does not work
No way to change the gamma or manually adjust the colors without generating or finding an appropriate ICC profile
Can't switch between multiple touch strip modes
No headless RDP
Opening files using command-line binaries in Konsole doesn't raise existing windows
Global Menu is not supported for non-Qt apps
Some apps' non-maximizable windows are broken with placement policy set as maximized
[1] https://community.kde.org/Plasma/Wayland_Known_Significant_I...
The Bluetooth integration needs work - missing features such as "never connect automatically."
Default lock screen experience still has a needless delay of 5 seconds when entering a wrong (even blank wrong) password, even on the first attempt.
+1 on the gamma controls
KDE on wayland doesn't let me roll up windows. I've been doing that for nearly 3 decades.
Pointer warp not generally supported so CAD programs fail in bizarre ways.
Although I think that there is FINALLY an actual spec for pointer warp. However, very few compositors support it.
Also, I still haven't found a clipboard manager that works normally on Wayland.
And I rarely get it to recognize all my monitors first try. And it crashes semi-regularly.
Not sure how much is inherent to Wayland vs Gnome, but life is way better since I upgraded to Xlibre & Cinnamon.