"The Play framework works with Java"...yeah so does Akka, Spark, etc but my experience is that it isn't first class support and many things are just tacked on f

"The Play framework works with Java"...yeah so does Akka, Spark, etc but my experience is that it isn't first class support and many things are just tacked on for a Java API to underlying Scala constructs. "slim down the amount of required tooling"...how? You can't even properly navigate the Play source code (e.g. "go to reference") without a Scala plugin (IntelliJ or Eclipse). And the libraries they use are still gonna carry around the big 'ol Scala runtime with them.