My suggestion would be to add more pragmas akin to `'use strict'` to the language and it's a complete enigma to me why TC39 seemingly does not go in this genera

My suggestion would be to add more pragmas akin to `'use strict'` to the language and it's a complete enigma to me why TC39 seemingly does not go in this general direction. Pragmas would allow to break backward compatibility, this green-eyed monster from the swamps that keeps from just doing the right thing because it would break code. I'd be fine if new syntax for that was introduced, like `%use sane`. JavaScript is too precious to be discarded. Nobody is an expert in an entirely new language, I say let's rather build on the experience of gazillions of well-informed JavaScript users and rip out the bad parts. With pragmas we can do that.