I am not too familiar with Erlang, but I am very familiar with Python and C++. And you put Erlang between Python and C++ by verbosity, so I made my conclusions accordingly. Also, synchronization and locking (with mutexes) are not the only approach to parallelization in C++. You can immutable objects, futures and other high level concepts. But Erlang has to be really nice for the stuff it was designed for, I have no doubts about that.