Same but I strangely miss the social aspect of achievements on Steam. I prefer GOG but wish the achievements synced.
It's certainly not a primary purchase decision factor but I've not bought games because they did not come with steam achievements.
I view achievements as one of the most annoying developments in games (and unfortunately some productivity software these days, in the shape of "badges").
They're yet another gamified growth/engagement pattern to contend with in life.
https://app.opencve.io/cve/?vendor=gog#:~:text=The%20GalaxyC...