Stop posting this unless you have an actual argument as to why it's not just FUD. This dumbass blogpost has been debunked over and over and over again.

Google Talk didn't kill XMPP.

XMPP didn't have a significant user base, Google Talk did, so while Google Talk supported XMPP, other open source XMPP clients got to ride their coattails and interact with a huge community and it felt like XMPP was thriving, when in reality Google Talk was what users cared about, not whether or not it connected to the rest of the minor XMPP networks, so when Google Talk decided to stop using XMPP, their users didn't care or switch and XMPP died.

But that's fundamentally not because Google killed it, it's because Google was the only thing keeping it alive.