Larian’s previous game (Divinity Original Sin 2) didn’t have a native port, the one before that did. I think it’s unlikely that BG 3 will get a native port but it seems to work well enough through Proton.
Which previous games were you looking at by the way, BG1 and BG2? BG3 has little to do with those except for the setting, it’s a really different game (some dislike it for that).
I’ll probably get 2024 at some point, but maybe not for the right reasons. I bought MSFS 2020 from the MS Store because I thought it would upgrade in the background but it doesn’t, the updater is still a mess. Now I want to move my pc to Linux and my MS Store version of MSFS is about the only game/software I have that won’t work with Linux/Proton/Wine, that I care about. So I’ve been looking to get Steam version of 2020 in a sale, even though it looks like that won’t be a seamless experience either, it at least has a chance. With 2024 coming out and sales never going quite low, I’ll wait for 2024 instead and see how it’ll run on Proton. Or I’ll get X-Plane 12 because that has a native Linux build.
There should be a warning since SteamOS v3.3: https://store.steampowered.com/news/app/1675200/view/3401924854795478414
General -Added notification when Steam Deck temperature goes outside the safe operating range
I’ve had more luck streaming games with Moonlight (+ Sunlight server on game pc) than using Steam Link, both for controller support in certain games and just better latency. Even on Steam Deck, when I’m at home I barely notice a difference, it saves a lot of battery and I can AAA games without compromising in graphics settings.