"ECMA TC39", not "Emca TC39". Also, looks like a bad markup link for TC39. Also note that it's either "co-authored by Mozilla, Apple, Moddable and Sony" or "authored by Guo along with others from Mozilla, Apple, Moddable and Sony", but directly related to that statement, that makes this "not a Google proposal" but clearly an "industry proposal" if it has Mozilla and Apple buy-in.
Also, "the proposed solution is not to backtrack on existing features" makes very little sense. If you're going to split something into core and "compiles down to core", then a LOT of features can be moved out of core because they're just (definitely worth keeping, but not necessary in core if that split were made) convenience APIs.
> 1995 - Brendan Eich reads up on every mistake ever made in designing a programming language, invents a few more, and creates LiveScript. Later, in an effort to cash in on the popularity of Java the language is renamed JavaScript. Later still, in an effort to cash in on the popularity of skin diseases the language is renamed ECMAScript.
Also, "the proposed solution is not to backtrack on existing features" makes very little sense. If you're going to split something into core and "compiles down to core", then a LOT of features can be moved out of core because they're just (definitely worth keeping, but not necessary in core if that split were made) convenience APIs.