Plasma 6.3 is out! So far the response has been very good, but of course a few issues were found once it was in the wild.
I find this a bit too sweet-coating, the reality is most of X11 users got a broken system if not all.
They represent supposedly about 20% of Plasma 6 user base (and decreasing).
That’s mostly a failure of a beta period and a testament that Wayland development has been and is the main focus.
Arch did backport the main fix to 6.3.0 so those users should be fine but not fedora, tumbleweed or neon users.