I believe that would be impossible. Also, the client isn't required to do a lot of parallel work, it's just an end point for the two way communication with the

I believe that would be impossible. Also, the client isn't required to do a lot of parallel work, it's just an end point for the two way communication with the server. The servers, on the other hand, have to serve all the million users connected at any single moment. That requires a lot of parallelism, and that's the most likely place where Erlang was successful.