Unfortunately XMPP died roughly when the mobile devices became a mainstay. The way Google de facto took over the protocol didn’t help either, but even without it XMPP isn’t fit for the mobile-first world. The client needs to maintain an active connection at all times and there is nothing akin to push messaging, causing quite a significant battery drain. I might be unaware of some progress in this regard but this is how I remember it.
We have chat standard called XMPP created by literially the same org that makes standards for Internet and Email.
And there are other public protocols to choose from.
Unfortunately XMPP died roughly when the mobile devices became a mainstay. The way Google de facto took over the protocol didn’t help either, but even without it XMPP isn’t fit for the mobile-first world. The client needs to maintain an active connection at all times and there is nothing akin to push messaging, causing quite a significant battery drain. I might be unaware of some progress in this regard but this is how I remember it.