Comment: Re:How does this help Google+? (Score 5, Insightful) 323
That's not the point, the point is that if Google+ (or whatever they're naming their "standard") isn't open, then the cottage industry of third party IM clients (some of them are actually pretty decent) would roll over and die.
That's what puzzles me about the move: If Google said '95% of 3rd party XMPP servers are spam bots, we aren't doing federation unless you are a Google Apps customer or otherwise verifiably unlikely to do something dramatically stupid', that'd be annoying but not wildly surprising. Dropping XMPP entirely, though, both kills 3rd-party clients and suggests that they were either unable to shoehorn what they wanted into XMPP(even as a proprietary extension, with the standardized subset allowing partial compatibility), or they saw breaking compatibility as a virtue.
I suspect that federation(at least outside of paying customers, who are both more important to listen to, and less likely to be spambots), is viewed as more trouble than it's worth; but dropping XMPP entirely is an entirely different game.