Well unlike the majority of C++ warts, JS is doing a very good job of "hiding" it's ugly parts with things like "use strict"

Things like `with` and a bunch of ugly parts were hidden with the introduction of "use strict", and i'm more than confident it will happen again in the future with something similar that can let you "opt in" to an even stricter JS that leaves behind the "current" warts of javascript in favor of much better ways.