What I can't understand is that CDPR is willing to confer legal rights to play their games in perpetuity in stark contrast to virtually every other similar platform, yet they don't bother to hire a few developers to maintain a Linux client, effectively forcing its users to be at the whim of Microsoft, which surely is going to have its users' best interests at heart.
You can use the heroic game launcher instead of gog galaxy: https://heroicgameslauncher.com/
And you can just download the games from their website, they don't force you to use gog galaxy.
I have purchased several games for Linux from GOG. I have never needed a "linux client" nor do I ever want one. Why would I want that kind of shitware when I can download the installers right off their website? The only reason that sort of software ever became normalized (e.g. Steam) is because it acts as DRM, but GOG doesn't have DRM.
I’d guess money has a lot (everything) to do with it. The Linux gamers market is not big enough to be worth the investment.
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I don’t entirely disagree, but I believe that GOG has always been focused on simple file-based DRM-free distribution (just download the zip).
GOG Galaxy has been experimental until recently and it is more concerned with being a unified gaming client rather than the primary way to distribute GOG games. In the last couple of years it has actually become quite unstable anyway and it is barely being maintained, clearly not a focus, Linux or not.
“Forcing its users to be at the whim of Microsoft” is quite a stretch.