Babel doesn't solve the problem of having a minimal standard library. Unlike say Python or Ruby, where batteries are included, JS is roll it yourself, add a dependency, or go without in almost every case. Even for seemingly trivial things like "Array#contains"
A lot of things in there would need a library for cross-browser compatibility still. That's my point, but I take yours as well. It's still a very BYOL (bring your own library) kind of a language!
