Some developers make gog users second rate citizens, some don’t publish on gog at all. I wouldn’t call it a sinking ship though, later years they’ve had more big name games such as Baldur’s Gate 3 than before.

Also, if gog shuts down tomorrow I can still install all my games from the installers on my network share, something I can’t say about steam.

I am very happy about Proton/SteamOS and how they assist in making games playable on Linux. I hope the SteamOS devices become popular enough that developers stop trying to shut Linux out.

I’m not looking forward to what will happen with Steam when Gabe is no longer around though.
Having one big marketplace/launcher might be comfy right now but that can turn into a nightmare quickly when there’s a new owner in town.

Personally I’m trying to buy any game I can on gog.com instead of Steam. Both to get my own offline installers and to ensure not all my eggs (games) are in one basket. I launch more games from Lutris then Steam today.

Personally gaming on Fedora without trouble. I’ve heard good things about Nobara - https://nobaraproject.org/author/gloriouseggroll/