This is the point. I still work in Java occasionally but I'm much more effective delivering in Clojure today - with 10 years experience, than I am in Java which

This is the point. I still work in Java occasionally but I'm much more effective delivering in Clojure today - with 10 years experience, than I am in Java which I used my entire career. Same host environment, many of the same libraries, same developer. Different language, different mindset.