The really great thing about all of the unique reactivity with race/class/deity combined with the huge party/party banter possibilities is that it's leading to a lot of people passing notes about what they've seen. It's something I'm greatly enjoying as well, since I know I will never have the time to play through the game in the specific ways needed to witness everything for myself. Everyone's experience is entirely unique.
Kingmaker launch was kind of like that too, although it was more about discussing bugs in the end and damn near everyone being new to the setting/ruleset.
I haven't seen BG3 inspire that kind of behavior among the community just yet. Maybe with full launch it will.
Still, these games are really good at making your main character feel like they are uniquely your own, in a way I struggle to find in any other cRPG I've played for reasons I can't even fathom. It's a lot of small things combining to form a big whole. And somehow it manages this while still featuring companions that have far more depth than most other cRPGs, because it understands the concept of party banter being the primary tool to simultaneously flesh them out and have them feel like they are truly part of the world, rather than clashing with it.