I’m still newish to gaming on Linux but from what I’ve heard Nvidia drivers are hit or miss but much better then they used to be. AMD graphics are well supported and using a mix of Proton though Steam and Wine I haven’t really had any issues with games. I have an ROG Ally running Bazzite and a gaming PC running Vanilla OS 2, both do just fine. Additionally hosting game servers on my Debian server has been fine as well.
If you’re on the fence I’d recommend installing on a separate drive and giving it a try.
My partner and I were gratefully surprised when we bought a cheap Hisense for their cozy space (to isolate when overstimulated and just play some games) that in the setup it offers the option for a ‘dumb TV’ mode with no requirement for internet. In addition you can reject the user agreements and still use the TV. It boots straight to HDMI, no pop up ads, and is snappy.