I think you misspelled GOG. Steam itself is a DRM (even though some games don’t have the DRM in place), you’re still at the mercy of a company to allow you download your rented games and at the mercy of a developer to not include it.
Sorry, but you can’t be a supporter of game preservation and Steam at the same time. They’re on opposite spectrums
They’re the same crap, or do you forgot about the PSP GO?