I wrote synchronous communication, with which I meant the combination of a sending a request message and do a blocking wait for a response message. I'm aware th

I wrote synchronous communication, with which I meant the combination of a sending a request message and do a blocking wait for a response message. I'm aware that the pure message sending in Erlang is async. What I intended to highlight is that the "do a blocking wait for a response" part is possible in Erlang, but not in Pony or Akka (yes, you can do it in Akka, but it's not recommended for performance reasons).