When I finished my undergrad a few years ago, we were relying heavily on GroupMe chats, with the occasional Slack and one or two LinkedIn groups mixed in. Discord was just starting to exit the gaming sphere and hit the mainstream though. I'm willing to bet it's absolutely dominating the space now.

How long ago was that if you don't mind me asking? I was in college 2014-2016, and GroupMe existed but was on its way out. I asked our college interns around 2022 what people use for class groups, and I think they weren't sure what I even meant, but the answer wasn't Discord.