Comment by t0bia_s
One of reasons why I buy games exclusively on GoG is clientlessness. I don't like when clients messing with game updates, because of modding incompatibility.
Unfortunately modding is reason, why switch to linux for gaming is not easy.
That's also one thing Galaxy gets right. You can turn off auto-updates and that won't stop you from playing the game (unlike with Steam, which will just replace your "play" button with "update"). They also support rolling back updates, but I never tried that and I'm not entirely sure if this works for every game, or if this is something a game developer has to actively support.