Basically the anti-DRM stance. If I can buy through GOG, I will do that because I know that edition is not DRM encumbered. In steam it should be optional, but plenty of games that are DRM-free on GOG are DRM-enabled on steam. And while GOG galaxy is Windows-only, at least they do bother to provide Linux installers for some of the library.
I will grant that Valve are doing a lot more on Linux and ecosystem, with more integrated support and extending the Linux support to cover a lot of games where publishers didn’t lift a finger to enable Lniux. Probably stemming from having a significant more amount of money to work with and freedom from public investors to let them spend as they see fit.






Ah yes, a tortuously slow gui with late 90s “skin” design sensibilities…