Speaking of Google, GChat supported XMPP at one point too, and we could have had cross-service federation if all the big companies would have played ball: http://www.disruptivetelephony.com/2015/02/google-finally-ki...

Why not work on pushing an open standard instead of locking users into your proprietary client? I already know the answer (ads and user data collection; see also: G+), it just leaves a bad taste in my mouth #dontBeEvil