There must be. Look at our telephone system. It's practically
  crash proof. Why? Erlang. It handles concurrency processing
  perfectly. None of the processes interfere with each other. They
  pass MESSAGES to each other, but they each retain their
  identities.

  Independence of identity while only passing messages is the key.
  As soon as you get statistics involved, and people getting
  lumped together as numbers that lose their individual
  identities, well, then there's problems.