GOG has some very useful features compared to other stores. Namely, they provide offline installers and DRM-free games (with some exceptions perhaps, but that's not an issue, as at worst you'll end up in the same situation you're in with Steam or Epic). Apart from this, GOG is the only real alternative to Steam, and it's a very good alternative (even better in some areas, like the variety of older games). If I can choose where to buy games, GOG is definitely the first choice!
