Coming from a background of being comfortable with Ruby, Python, and Java; I started with ES6 a few years ago and moved over to Typescript last year. While ES6 makes Javascript much nicer, Typescript makes it way better and easier to maintain especially with a decent IDE. I already had a lot of respect for Javascript developers previously, but when I started developing node apps with ES6 it grew even more. I can only imagine the discipline needed to maintain large Javascript apps before ES6 and Typescript