A few points: - A large system never runs on a single machine if you want any level of realistic fault tolerance. Two nodes is a bare minimum, 3 an acceptable

A few points: - A large system never runs on a single machine if you want any level of realistic fault tolerance. Two nodes is a bare minimum, 3 an acceptable one. - The number of nodes will always depend on where your bottlenecks lie. Erlang developers would be rare and few to write CPU-bottlenecked code directly in Erlang. The usual approach would be to write your system in whatever is appropriate, and then too coordinate things with an Erlang layer. - I would a hundred times more willingly maintain and debug a running Erlang system than a C++ one. I'm kind of sold on the idea though, and wrote http://erlang-in-anger.com http://erlang-in-anger.com to share my experience there.