My experience with GOG is that it is a fringe option, at least in the combined North American (USA+Canada) culture. Plus, the unfortunate reality is that in many cases GOG’s principles preclude it from being a genuine competitor to Steam. Insisting on being DRM free means half of released games never go to the platform, so it will always be the secondary “better if” option.

I worry about Steam’s functional monopoly on PC game access. It hasn’t been an issue so far, because it has remembered that it is, first and foremost, a service, providing consumer protection through a generous refund policy and supporting devs with easy access to simple matchmaking and anti-cheat systems. But without a healthy competitor, it would be easy for Steam to start milking it’s users and developers alike.