And that's why my money still largely goes to Valve. If GOG supported Linux, I'd buy a lot more games from them, but they seem happy to just piggy back off of FOSS Heroic launcher without actually contributing to it.

I'm not expecting a Stream-level of effort, just the Galaxy launcher a way to select WINE versions. Bonus points if they have official instructions to play games on Steam Deck available on their website.

This. I'd be all over GOG but as it stands, Steam QoL on Linux is superb compared to the other options.

Plus, Proton, supporting that development, etc.

And in spite of the fact that they at one point updated the community wisglist item for Galaxy on Linux to "in development" but I have never heard an update and I couldnt see it on the page anymore, but that might just be mobile.