I really dislike that kind of attitude, even though Clojure is one of my favorite languages. There are so many things to learn in software and computer science, and programming languages -- even programming paradigms -- are a very, very small minority of them. Maybe the GP prefers to learn about data structures, optimization algorithms, scientific computing or OS design rather than new languages?

I actually find that learning new languages is among the laziest, and least important things to learn in software and CS.

Please don't put down other developers over what they choose to learn.