[hinkley]

As someone perpetually looking through this window from the outside, my gut instinct is that I want a model that's a more pessimistic version of the Erlang model. Mostly around assuming that not all processes are good guys (more opinionated and less generous supervisor), and back pressure for mailboxes, instead of having to roll your own cooperative overlay.

I would not be surprised if the latter in particular introduces scalability issues due to making asymmetric communications more symmetric, but if people are having to introduce their own wheels, it may be better if the system provided it instead.