I’ve been using it daily for about a year on my primary desktop gaming pc without any issues. I love it.

As for performance, I vaguely remember phoronix doing a benchmark comparison of a few distros and in some tests it was marginally better (cannot find it now though…). For the most part though I’d say it’s not as much about potential performance gains as it is ease of use for gaming. So many useful tweaks and useful programs “out-of-the-box”.