Seems a bit unfair to show a rate of packages per year based on the full life of each language, as the principle package repos haven't been around as long as the packages/year implies.
I don't understand this reference. I have to say, I agreed. I don't see a lot here that is unique to node.js. If anything it's the culmination of timing that reveals the current state of advancement and collaboration in today's OSS/software world. But I think Go or Rust are emerging examples of a similar phenom.