Jabber adaption was always low because of the catch 22. Did Google realistically steal people away from xmpp/jabber? You would have to argue that a large share even knew or cared at the time what it was. And weren't just using it because Google. Which was largely the case. The few of us that were using it specifically as an xmpp client. Left as soon as they closed off and drop her ability. To this day I still use jabber / XMPP. But I don't use Google talk anymore.

With all these things as is always the case. Most people go where most people are. They don't care about privacy openness or interoperability really. Many are slowly coming to realize the value of them. And for them jabber and XMPP will still be there.

One of the small metaverse communities that I use off and on HTTP://sine.space has an XMPP back end so that even when you aren't fully logged into the world. You can still chat and receive private messages. Though not participate in the open world messages. People and companies are still using it. Even if it isn't the darling it should have been.