Dusk: Unpopular opinion: I'd rather pay Valve 30% and put up with their de facto monopoly than help Epic work towards their own (very obviously desired) monopoly
Valve supports linux gaming! The Steam Deck is awesome and with an even better configuration (or the rumored valve's own new steam machine) this is only getting better. So, only Valve gets my money.
I buy games pretty much exclusively on Steam because of the Linux support (my gaming PC runs Linux only).
Hopefully more places follow suit because I believe competition is a good thing but for now it's Steam all the way pretty much apart from Starsector and until recently Dwarf Fortress.