[strmpnk]

It’s technically the receive primitive doing this using the after clause. The addition of unique references and selective receive then allows “call” style interactions to built (like gen_server).

Likewise, links and monitors are used for lifetime concerns instead of reference counting actors like Pony or using a global tracing collector. This has some advantages and disadvantages but for the most part I personally find it far more practical than other models which are more like the classic actor model.