If only we did not have mutable data structures, there would be no or few problems to find in this. Concurrency isn't hard - try Clojure core/async and you wil

If only we did not have mutable data structures, there would be no or few problems to find in this. Concurrency isn't hard - try Clojure core/async and you will find out. Shared mutable state is mind-boggingly hard