Proton is open source. Anyone can pull it together and integrate it. Gog have been doing DRM free games for a while, they'll be quite keen to fill this niche. Epic probably won't care. If none do, someone will want to.
What are you smoking? GOG Galaxy doesn’t even have a Linux client. In fact it has been one of the most requested features for years and nothing has happened.
Edit: it’s also the reason I stopped buying from them when I got my Steam Deck.
So you're saying if Valve enshittified, they wouldn't fork and try to capitilise on that market?
They probably do not see the point right now as Valve have it sewn up. Lemmy grew when Reddit scored own goals. When Valve do, opportunities are there and would be taken.
Valve is a private company whereas GOG belongs to CDProject - a publicly traded company. GOG might want to fill the void but they're more likely to do dumb, shortsighted decisions in contrast to Valve.
As far as I know GOG also sells drm content and Steam also sells drm-free content. So what's the point
they'll be quite keen to fill this niche
I also don't remember them doing anything for Linux apart from releasing a broken port then badmouthing people who complained that the game they bought is broken.
No, you can for the games that don't have drm, just launch the executable. Steam itself doesn't require any drm. Even the games that use Steam services can be drm-free. Here's the list of some drm-free Steam games