IMHO XMPP / Jabber is the best Instant Messenger (IM) protocol

It is battle tested, standardized, widely used, have open source servers and apps, end-to-end encryption (OMEMO), self-hostable and are low on ressources and federated / decentralized.

I use it with family and friends. Conversations and blabber.im on android and Gajim on Linux. There's also apps for windows and Apple.

Curious if anyone here use it and why, why not?

EDIT: Doh. In these Lemmy times I forgot federated. Added.