Stability is really good. No real big issues overtime, running BTRFS and Timeshift. There are some minor problems here and there but more to do with KDE or Arch being Arch I suppose, nothing that stopped me from having a non-functional system.
Not sure what you expect in terms of "support for gaming", It's Arch-based so mostly you're on your own to do that, not from the distro focus itself but everything has worked so far for me.
I don't often use the AUR, most packages come from flatpak if I can or the extra repo from Arch/Endeavour which is trustee packages by default. I added the CHAOTIC AUR to get binaries instead to get faster updates but didn't replace all my packages with them from there.
Pulled out of my ass as it was hypothetical.. Just that I rather support creators instead of orgs with ceo's salaries.