Lotta java haters yet it stays steady. I also remember 1-3 years ago HN was full of RoR fanboys but its been pretty slow since and SO trends aren't good. It's interesting how things change and what becomes more fad like. They're both good languages, I'm just saying this to say there are no magic silver bullets ;)

Personally i think that what happened is that RoR just didn't scale to bigger projects. Java isn't perfect by any means but right now there isn't anything that scales out as well. And by scales out I don't necessarily mean performance, I mean team size.