I can't guarantee that every build is going to be perfect for every user, but I can certainly guarantee that you can use the one that worked best for you
Plasma 6 is still new and still has a few bugs so it may take a bit for it to get properly stable. Pretty sure this is why Debian based distros are still on Plasma 5.
...this isn't the first KDE...quirk. SDDM had a malfunction earlier this month on F40 proper where I would just get a black screen after I logged in if I had my second monitor plugged in
If they hadn't pushed EGLStreams so hard and spent that effort getting an early start flushing out the corner cases and improvements needed to GBM like they are now from the start AMD would definitely be on the ropes.
unlike nvidia, we do have many direct lines of communication to AMD that aren’t “send an email to this obscure nvidia account or post on a forum for it to get buried”