I've also built myself an HTPC for gaming on, and it works amazing since Valve gave us the Steam OS 3 UI.
However I did it a while ago and went down the HoloISO route. Would you recommend that I switch out for something like Bazzite, or are the benefits good but not *that* good that I'd have to spend a day reinstalling all my games?
I ran chimeraOS for years and it worked fine, I switched to dogfood more than anything else. If your system is working there's no reason to mess with it.