Sincere question: is XMPP still widely used anywhere? It seems like Slack etc have eaten the “small” corporate deployments that aren’t big enough for something horrible and enterprisey. For instance, I can’t imagine IBM using Jabber throughout the org.

But I say that full well knowing that I don’t have a lot of experience inside large enterprises, so I’m guessing about things I don’t have evidence of.

So who uses XMPP today, and what’s it used instead of?