It should be clear to anybody working with whatever.js that this is not technology that is here to stay.
This is still a browser patch. And everything underneath anything.js is a patch or a port or a hook, or a kludge.
There is no memory management, no threading, no accurate concept of parallelism and no support for anything but what the browser makers want to support.
Javascript is not a real language. It encompasses no real technology. And it will be replaced.
Javascript is the new applet.