I've used Ubuntu since 2006 and started using Kubuntu (I prefer KDE) about 2 years ago. Ubuntu (or Kubuntu) are very solid for gaming. It puzzles me how often I see highly customized distros like Bazzite and CachyOS touted for gaming after looking into some of the wild tweaks those distros do; it's amazing to me that they run at all.
As someone who used Linux (Ubuntu, Fedora, OpenSuse, Arch) exclusively from 2010 and recently moved to bazzite, I only see positives from the switch.
Most of my usecases work OOTB, and for everything else I use a container workflow. I like that there are fewer ways to mess up upgrades. I like that flatpaks are well integrated.
PS I keep Snap disabled.