You really don't need to learn Erlang. Would it help to understand some of the deeper stuff in some libraries or the beam itself? Sure, but then you could argue

You really don't need to learn Erlang. Would it help to understand some of the deeper stuff in some libraries or the beam itself? Sure, but then you could argue you need to learn Javascript and C to use Node because a lot of low-level stuff in node is C. Will it help to become a better Node dev? Probably doesn't hurt but you def don't need to learn C to work with Node.