With Valve finally managing to make fetch happen, any large company starting a project today must consider the value of releasing on Linux for Steam Deck.
The problem is the games coming in the next years started development five years ago.
>>philis+(OP)
The real sore spot is with multiplayer anticheat, about 50/50 according to https://areweanticheatyet.com/ ... plus maybe a few singleplayer games with draconian DRM. Otherwise, things usually just work with the occasional hiccup (those hiccups, in all fairness, can be a real PITA to resolve though from my experience; but things are getting better with time too!)