What are the key takeaways from “The forgotten developer who saved JavaScript...” on Fireship?

What is this episode about?

JavaScript’s evolution from a ridiculed, 10-day experiment into the world’s most popular language was driven by Jeremy Ashkenas. Through Underscore.js, CoffeeScript, and Backbone.js, Ashkenas provided the essential standard library, syntax improvements, and architectural patterns that forced the language to mature, eventually forcing the official ECMAScript standards to adopt his innovations.