I thought the same thing when Node.js started to become popular: why would anybody go through the trouble to set up an environment to run single-threaded, inter

I thought the same thing when Node.js started to become popular: why would anybody go through the trouble to set up an environment to run single-threaded, interpreted applications on a server when we already had C/Java/.NET/etc? It turns out people like to use the languages/environments they already know.