Functional Programming does deal with concurrency with immutability. And thats how you should deal with it in scala. The fact that you can use mutable construct

Functional Programming does deal with concurrency with immutability. And thats how you should deal with it in scala. The fact that you can use mutable constructs in concurrent program is no more a flaw of scala then the fact that I can execute any pointer in C as a function is a flaw of C.