As someone from outside the Java universe, I'd like to learn more about those reasons and why they are obvious.
Clojure with its s-expressions and dynamic typing is going nowhere except for some small, high-brow teams...just the way it is.
Scala lost its opportunity a while back with its perception problem and lack of IDE support.
Java's IDEs just cut down the boilerplate and scutwork involved in dealing with Java. They can even make Java usable. That is, in fact, an advanced and challenging task.
I have discovered that my corner store sells a commercial IDE for Lisp that accomplishes the same thing -- eliminating all the garbage involved in Java programming. It's called a notepad and pen. Combined with a Lisp, it surpasses all the features of Eclipse that eliminate busy work, duplication, and waste.
And it executes code about as fast as a JVM straining under Eclipse, too.
