Python has no parallelism story. Once you start using the Clojure parallel primitives, there is no going back: you will never want to deal with managing threads

Python has no parallelism story. Once you start using the Clojure parallel primitives, there is no going back: you will never want to deal with managing threads and mutexes again. It's kind of similar to the feeling you get once you've programmed in a language with GC. You really don't want to go back, unless you have to.