Well, the same thing happened to many of the more open, hype-laden technologies. JQuery and Angular are both also obsolete, and the new hotness is React, with Google trying to get in on the action again with Polymer but so far uptake seems limited. I also wouldn't say "crippled" - I worked with Closure on both Google Search and Google Plus, and while I certainly wouldn't use it for a startup, it's much better than all of JQuery/Angular/React for a 50+ person team.

Guava is in a much different position. As a fundamental class library, it's much more deeply embedded in your code than a front-end framework, and so switching costs are much higher. You could also argue that Java as a whole is "crippling legacy technology", with newer apps being written in Go, Node.js, Ruby, Python, and hopefully soon Rust.