Look, JS is a lovely language, and it's fun to write things in Node. However, no one thinks that JS is going to become a "universal language", even though all the cool kids are writing the next great todo list web app using Node-powered hyper asteroids. Nor will Javascript "die out" for reasons that should be obvious to anyone. Some people will write backends in Node, but most people will write them via one of the other myriad backend languages available. Huzzah! Choices in backend development. Rejoice!