Good point. When I discovered Clojure and saw the light after listening to Rich Hickey's sermons on The Mount I found it almost impossible to work with OO code. Years later I asked myself if this had actually benefited me professionally, other than simply broadening my mind, and I concluded it hadn't because it limited me to the tiny number of Clojure jobs available and ruled-out earning good money working on existing code. In recent years I've had to reverse-engineer this experience and get to grips with the likes of Java, Kotlin, Ruby and Python.