When its cheap, I sometimes buy on GOG, but its almost always more expensive than Steam in my region, even before accounting for bundles, which is how I buy the majority of my games. It also doesn’t help that most of the games I play aren’t on even GOG, when I do go to look, discoverability isn’t great, and I’ve had some issues with GOG’s support in the past (nothing major, just a pain compared to Steam).
I do like the Idea of GOG, but with developers/publishers generally being uncooperative with publishing off-Steam, and GOG just missing too many features anyway, I can rarely justify it.