I wonder how many of PG's points apply to Go.
Java’s also a lot less crippled than it used to be.
So why throw away the performance and graphical tooling of Java/.NET, when they shortly thereafter also got their Rails inspired frameworks?
Personally having used an AOLServer inspired framework during the .com wave, meant that Ruby wasn't something I felt to be usable in production at scale, without wasting resources making it fast.