OK, let me put this differently. Why do people use Node.js? Because it solves concurrency issues or because it's easy to use JavaScript application server? Wh

OK, let me put this differently. Why do people use Node.js? Because it solves concurrency issues or because it's easy to use JavaScript application server? Why do people use Erlang? Because it solves concurrency issues or because it's massively distributed and fault-tolerant system? Just look at the popular projects and communities behind those two projects :) Don't get me wrong, I agree that both solve concurrency issues, but this is just tiny part on which they overlap and I don't believe that they are meant to solve the same problems.