paladin181: GOG having no Linux support when the Steam Deck released is pretty bad. Users generally have to choose between their PC and their Deck if their games are on GOG. And you might say, but Steam Deck...
How many games at GOG with a Linux version, don't exist at Steam?
And how many Linux version games does Steam have?
And how many games at GOG that don't have a Linux version that is available at Steam?
Clearly if you want bigger and better support for Linux games, Steam is the place to go. Linux is almost an afterthought here, and I collect every Linux version here I can ... for the games I like anyway, so have hundreds.
While GOG provide many games with Linux versions, GOG is primarily a Windows game store, that is really all about DRM-Free, at least for single player games ... a small number of iffy ones aside. Even multiplayer is often just an added extra at GOG, and more often than not a DRM variant where it is provided.
One could pose the notion that Steam Deck is somewhat like giving a game away for free, that is very paired back, then having lots of micro-transactions, which is where they actually make their money. Similar to how cheap consoles are, but the games for them often cost a lot. So Steam clearly have some kind of not so altruistic motive I reckon.
Now I don't use Steam Deck or even care about it, so I aren't any kind of expert, but on the face of it it does not seem a suitable thing for GOG to support.