It also powers the communications / presence on many gaming avenues as well like Fortnite, League of Legends, & whatever Nintendo is using for notifications + online status (assuredly a lot more games).
XMPP is old, stable, & massively scalable for industrial applications -- while maintaining decentralization + efficiency & allowing for extensibility like OMEMO encryption which is covering most folk’s chat use cases. Since the XMPP foundation don’t put budget into marketing & hype, a lot of folks weirdly assume it’s dead or not being used. It’s strange to me how folks seem more interested in RCS & Matrix despite their histories/ownership/flaws rather than embracing what is already good.