How exactly do you mean "stateful actor"? Whether an Akka actor has a state is actually up to you!? E.g. you could have your router fire up a new actor to proce

How exactly do you mean "stateful actor"? Whether an Akka actor has a state is actually up to you!? E.g. you could have your router fire up a new actor to process each request up to a maximum number of n concurrent actors etc...