Not at all an expert, but I’m doing fine with most games on Manjaro. Most things worked out of the box with Proton on Steam. I also liked Arch before I got old and lazy, and Manjaro seems to be a good way to get most of the benefits of Arch with lazier upkeep.
Do you have a plan for recruiting new users? Lemmy already struggles there and it’s one of the bigger platforms. If we move even further from the mainstream, I’m afraid we’d slowly wither away as people leave and aren’t replaced.