XMPP recently celebrated its 27th birthday - it was originally announced on
SlashDot on 4th Jan 1999
XMPP was originally called Jabber - it changed in 2007
XMPP backs the chat in Fortnite, played by over 100 million players
XMPP powers the push notifications on the Nintendo Switch
There's an XMPP server in Antarctica that coordinated humanity's first photo of a
black hole
NATO use XMPP for getting wounded soldiers from the battlefield
XMPP has been used in remote controlled cars. Mostly, toy ones.
XMPP sucks. It's used in robot vacuum cleaners.
Jitsi and Zoom uses XMPP for their video conferencing signalling
Compost Party is a solar powered phone running an XMPP server, amongst other
things
XMPP has cross-client social blogging and stories
The Nintendo Wii once ran an XMPP server
XMPP is being considered for deep-space communications, as part of the IETF
TIPTOP working group.