Hello and welcome! It's a pretty laid back board, though some things can be serious at times and you're welcome to be stupid or smart when you want to be. /jp/ is meant to host the bulk of the stupid threads while /qa/ is meant to be a little more serious, but there's nothing set in stone.
I am personally not a fan of vtubers, but I keep my opinion to myself unless someone makes a thread asking for it. There's definitely some fans of them here, but I'm not sure how busy the threads would be.>>1304
I think the defining trait of social media is that one's real life identity is paramount to everything and all real life baggage associated with it is brought about or even magnified. I don't consider reddit to be social media, which is probably why it consumed all the old forums. The way most people user twitter qualifies it as social media I think, including artists who make 200 blog updates between art posts.