No, thank Thor that mutant was aborted. ECMAScript 4 got everything wrong, just like AS3 did.

An optionally dynamic, yet also statically typed language? Umm... no. It's hard to even imagine arguing about this.

No. The problem with ES4 was that JavaScript is at heart not a traditional procedural OOP language. It's a functional language, and ES4 was trying to change that, a huge step in the wrong direction. They wanted more Java and less Script, but thankfully ES5 has gone the other direction, and given use more Script and less Java.