Tested #KDE Plasma 5.16 with Wayland and...
...still not usable 😞
In just 5 minutes, I hit all these bugs:
https://bugs.kde.org/show_bug.cgi?id=408877
https://bugs.kde.org/show_bug.cgi?id=408847
https://bugs.kde.org/show_bug.cgi?id=373907
https://bugreports.qt.io/browse/QTBUG-66008
Moreover, setting key repeat delay and rate doesn't work and I'm not sure which component this bug belongs to, but it's been there for years.