The best thing about GOG is the ability to never use a client or launcher at all. The ability to just download the installers from the website and store them locally means that your GOG games will outlast the following: GOG as a company enshittifies, GOG as a company dies, your account gets banned from GOG, you lose access to your GOG account, your favorite game gets a game-ruining update from its developer, some song license expires and devs are forced to patch or pull the game...