@sun personal use for friends/family mostly but also wanted to know how good they were in comparison to Slack/Discord.

I don't think they work very well for socializing because their features and design are just not aimed at that use case

But Zulip specifically has a very good approach to containing chat discussions to around threads/topics and making it easy for someone like a project maintainer to keep a handle on things

I think we should embrace it more, maybe even for Pleroma because IRC is likely one reason we don't get as much engagement plus people can't look back on previous discussions, are logged off when you reply, etc...