Comment by Night_Thastus

Galaxy is purely convenience. If you want to see all your games from all storefronts (Epic, Steam, GOG, etc) in one place, Galaxy lets you do that. (Along with the social stuff)

You can still play GOG games without any launcher, which is how it's intended to work.

Some people really like having a launcher to keep track of everything, so this isn't a nothing burger. It's one more convenience to help convince people to move over.