@aboxofsox
My take on the "bit more"s: For sure FB Messenger or GChat didn't kill XMPP. But they exacerbated the Federation fault lines built into the protocol. There Federation is a bilateral agreement. So if a big node refuses to federate small nodes are blocked out. That is what happened. I don't think the services you identify federate among themselves. It is my opinion that these two deciding to opt out of federation gave license to second stringers to opt out as well.
