1. I don't see how this is better than using a system that already has a mature language and libraries. Java, .NET, Python, Ruby, Perl, PHP, et al have that. Ye

1. I don't see how this is better than using a system that already has a mature language and libraries. Java, .NET, Python, Ruby, Perl, PHP, et al have that. Yes, Node is catching up very quickly. But how is catching up better than being ahead? 2. This is a restatement of the first reason. 3. How do you know that popular technologies right now are going to decline? Java was popular ten years ago, and it's still popular. Python was not popular ten years ago, and now it is. I don't expect either to decline in the next ten years. Node, on the other hand, could very well stop growing, or even recede. 4. Why would you require Node experience? A good web developer should be able to pick it up quickly. That allows you to work with the same general talent pool as if you were hiring for Rails or whatever. 5. This is a restatement of reasons one and two.