I'm wondering if the best approach to going full Linux would be to copy-paste somebodies' benchmark because surely if I get a brand new purpose built PC with all the right components? I bring this up because I remember how when I was messing around with Linux mint awhile back and I had very little time the damn wireless adaptor I had wouldn't even get detected.
The steam deck would potentially be the next best thing I suppose and have a different Linux distro installed on that. Going to have to have a think about it and I'm making this thread because I wonder if there have been people who have done proper experiments on this because I do think the hardware lottery is real with Linux.
My guess would be it's the expansion cards like wireless adapters that give the most trouble. I have been daily driving on linux for a few years now and every once in a while you do hit something that does suck, but for both my builds i've not had issues with mainline AMD processors / standard (but not expensive) MOBOs.
I also exclusively use Garuda as my distro because it comes close to what I'd want as a gaming desktop out of the box, and has the ability to quickly configure wine/ winetricks for the few things that aren't just 'enable on steam with proton', but I have had to reinstall sometimes to get things working properly.
Hope it helps.