I own an OLED Deck, and while I absolutely love it, it isn't perfect from a compatibility standpoint. Getting other launchers to work can be a pain, and certain games that the hardware can easily handle have issues due to obnoxious shit like EA's launcher, e.g. the Dragon Age games. Additionally, mods can be fickle to get working on certain games. The majority of these problems can thankfully be overcome, but implementing the fixes can be tedious/annoying on a handheld.

That all being said, I'm amazed how far gaming on Linux has come. Valve and people like Glorious Eggroll have done excellent work in making Linux gaming possible. I hope as more and more Deck users get accustomed to Linux and make the transition on desktop, that developers start making native Linux clients so all these wrappers aren't even needed in the first place.