What kind of preposterous assumption it is?(Sorry if I sound rude) Yes, few developers tend to come outside and explore but that doesn't mean that everyone is leaning towards Node. I am a Java guy, and I'm surrounded completely with Java crowd. I took interest in Node and started working on it for my hobby projects, and I went to gyan about Node during our usual discussion. The moment they hear JS, they simply ignore the topic. Yes, none of my colleagues are ready to listen about having JS in the backend. Forget about backend, making them agree to work with AngularJS was a battle for me, and I still see people do some silly mistakes in Angular, but that is because they are trying to do it in Java way!
So, As I said, maybe, just maybe, some are willing to look out of their window, but not many of them. I'm looking for a guy with whom I can talk about Nodejs and find no one in my company.