Danyl Strype at
Google drops XMPP support for Hangouts. A big step backwards for a
company which won a lot of kudos of the last decade for paying a lot of
lip service to "open standards".http://windowspbx.blogspot.co.nz/2013/05/hangouts-wont-hangout-with-other.html
Yeah, that sucked big time...
Now they've dropped Hangouts and replaced it with new chat system called Allo and Duo. I presume none of these are federated. What the hell is going on in the goOgle-verse? https://lifehacker.com/google-spins-off-hangouts-and-hopes-the-rest-of-us-just-1793132901