Can you explain how Google helped XMPP even in the slightest way? Because that's what I'm arguing against.
The only thing I can come up with is the increased popularity, which is shaky because tech-naive users wouldn't know or care about Google Talk's underlying protocol. Also, considering the rest of what Google did with XMPP, like making it hard for their servers to be interoperable with others, or their slow adoption of new features, it's clear to me that Google getting involved was a net negative for XMPP. I don't think I'm assuming anything to arrive on that conclusion.
Make the switch to Linux! Even if you need proprietary software for your work, you can dualboot and use a linux distro for your personal use.