I don’t use messengers with vendor lock-in. Therefore Matrix and XMPP see: https://www.messenger-matrix.de/messenger-matrix-en.html
Both self hosted on a Raspberry #freedombox https://freedombox.org/
Matrix has all the features like Slack and WhatsApp and XMPP Conversations: the very last word in instant messaging.
Yes, I’m on Dino too because it just works great and video is quite stable in combination with Conversations and of course it supports Omemo.
Before that I used Gajim but had to compile it myself and sometimes issues with plugins. Maybe it’s as easy as Dino nowadays.