Multiple people group calls with optional webcam and screensharing as well as the asymmetric conferences where there is a main speaker and people can request right to speak. Additionally Discord allows for multiple voice channels so you can have multiple such calls in parallel.
Basically the same features you have in teams, zoom, skype, etc. but I hate all of them. I wish I could find some open source alternative that is decent/known, matrix should implement those imo
I was lucky to successfully move my girlfriend, two friend group chats and my family ones so 14 people 😁 They still use other messengers but at least they use Signal on a daily basis