> Node took off because it allowed an already-existing huge ecosystem of libraries, tools It didn't. JS didn't have a huge set of existing tools and libraries

> Node took off because it allowed an already-existing huge ecosystem of libraries, tools It didn't. JS didn't have a huge set of existing tools and libraries when Node showed up. And the ones that did exist certainly didn't work in Node, considering they were written for the browser without a care in the world for other environments.