Not just on Steam but only for Steam Deck
But I think that's an understandable position. One single distro with one single hardware (okay two because the LCD and OLED versions has some differences).
Once you go down the "full Linux support" way it's a hellhole of different distros, compositors, proprietary and open source hardware drivers etc. This is where Flatpak, AppImage, snap etc. could actually play a good part imo if done well but I'm not sure I've seen any games released on Steam for Linux in those formats (maybe Steam not even allow it)
Edit: you can download BG3 for any Linux distro not just the Steam Deck
> proprietary and open source hardware drivers etc
Somewhat of a problem, but not so much anymore, most Linux gamers know to use AMD and Mesa. So I'd say their focus on SteamOS is a good base of support.
Using heroic and wine is so seamless that I don't even remember if I have been running a game natively or not. It just works.
If you're using Heroic on Linux, then there's no question whether you're running games natively or not. You are running a Windows game in WINE (or Proton, a WINE fork). Epic Store doesn't carry any Linux native games (even when a native Linux version exists).
It's because building for Linux expects specific versions of system libraries like glibc, if you compile your game on newer glibc, it may not run on older version of glibc at all. Steam solves it with Steam Linux Runtime compatibility layer which forces the game to run with specific glibc (and others) shipped with Steam on Linux, other video game stores have no equivalent solutions.
Anyway, Steam runtime is a massive overkill especially when its libraries get outdated.
But I agree in general. The issue is probably that GOG is a smaller store than Steam and Linux segment for them in result is also way smaller than for Steam, so they don't see it as a priority.
Meanwhile you can use lgogdownloader.
It's sort of interesting that they support Linux as platform for games sales to begin with. Besides them, Steam and itch.io who even does?