So what’s the problem about using third party clients like heroic game launcher ? Or did I understand the first line of your post wrong ?
Heroic is just as terrible. None of the alternative ways to manage game libraries support any of the large list of features that Steam does that I rely upon to make PC gaming a comfortable experience, and that list was far from comprehensive.
Until there’s an open game library management tool in any way comparable to Steam, DRM free has no value to me. I’m willing to (and want to, for the things I haven’t yet) self host movies, ebooks, audiobooks, TV shows, etc, because you can get a functional experience with them. I am not willing to do so with games because you cannot.
Steam makes millions of dollars for Valve. They can afford to put a lot of work into making it impossible for anyone to ever catch up to them. If you will never use anything else until it has feature parity with steam as well as having other upsides compared to it, you are never going to benefit from the other upsides.
What upsides?
A. Many games that are DRM free on GOG are also DRM free on Steam.
B. Most of the games that are only DRM free on GOG are old, out of date builds that don’t get bug fixes and updates.
C. Even if both of those weren’t true, DRM free isn’t worth a terrible UX and no features. If GOG had feature parity for everything Steam does except big picture mode, big picture mode alone would outweigh the outrageously small chance that Steam somehow removes access to my games.
But they’re not just not at feature parity. They’re like 2 out of 10 software. Better than Epic’s 0 of 10, but still really bad.