I agree that hoisting these onto an existing language, especially such a "mutable" one as Javascript is difficult and introduces unfortunate complexity. The in

I agree that hoisting these onto an existing language, especially such a "mutable" one as Javascript is difficult and introduces unfortunate complexity. The intuition (and perhaps hope) that Javascript already has such a large install base and that, once the changes are available in all major browsers, a cultural change is possible through it seems to be the main motivator for them to focus on this language. Even if the syntax of the language cannot be adapted to it, and people won't create constructs themselves with these primitives, there may be a chance that programmers who do not know the fundamental concepts of the theory can still enjoy its security properties by using third party libraries (heh) like SES that provide higher level primitives, e.g. to isolate other imported libraries. I'm still skeptical myself if the focus on Javascript is the right approach, but i'd prefer their intuition to be right on this. Creating a new language will always be cleaner, but adoption is where E failed.