Yep, groups was essentially all I used FB for until we moved to Discord (which much better for us), I was so glad when I could stop checking FB completely.
Problem with Discord is you have to enforce real names otherwise you have to limit it to people you know.
Young people I know (except for gamers) find Discord a bit sus because you don’t have any baseline with regard to name or profile pic. Also who already knows who. Discord doesn’t expose any social network outside of the specific server.
You would think Discord would be the community of choice for Gen Z but in reality it’s limited to gamer and gamer adjacent folks.
Turns out identity and known social network are still things people look for to achieve a base level of trust for real time chat.
Reddit and HN are more topic driven, but chat somehow feels more personal.
