As far as I'm concerned we will still be adhering to all the core language constructs for the most adopted interpreter until a viable ancestor arrives.
It sounds like it. So in the grand scheme I guess JS is still growing, except that it's increasingly not written directly. While it's useful to look at TypeScript & Co. somewhat separately, it makes little sense to treat them as completely separate and conclude that JS is now shrinking.
I have no issue with javascript fading away over time, that's just not what's happening right now.
people are switching to things like Dart, Coffeescript, and Typescript.