I have a team with java/php/javascript experience. PHP will not be an option for my use case. I need a json based rest interface with a decently discoverable web interface. Java has stupidly powerful rest interface libraries with jersey or full application servers, and javascript has hugely powerful frontend interfaces with angular or other frameworks, based on a strong rest interface. And the strong rest interface goes right back at java.

And we are just a limited team with java* experience. I don't know what teams with django or other twisted libraries will do, or what ruby shops will do. The era of "just make it easy to print html" is gone.