> this can easily happen in a BEAM system
Wait... I thought all you had to do is write it in Erlang and it scales magically!
Erlang makes a lot of hard things possible, some tricky things easy, and some easy things tricky.
There's no magic fairy dust. Just a lot of things that fit together in nice ways if you use them well, and blow up in predictable ways if you have learned how to predict the system.
I know that, having built several myself. Sometimes people get a bit ahead of themselves with the marketing though.