Likely you do or have without knowing it. The protocol is used in telecom quite a bit for all sorts of things. Jitsi is built on XMPP. Lots of games use it for chat - league of legends and unreal engine I believe. Xmpp shows up in all sorts of places if you look.
It's the muscle memory. I tried really hard to use things like vs code that do a lot of things better (or at least more automatically) and always end up more efficient in emacs.
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