I was reading the XMPP newsletter for April 2021, and saw an interesting summary:
Isode presents their military capabilities at DSEI 2021, offering Military Instant Messaging and more.
And hey, they are sell XMPP products to the military!
https://web.archive.org/web/20200513143916/https://www.isode.com/markets/military-xmpp.html
So that’s wild. But also kinda reassuring, for a protocol. They have an interest in keeping the protocol secure and sustainable. If only every XMPP project were able to dip into the Pentagon’s budget!