Why are you all crying when a new language comes out? For my point of view designing a language is like art, and often a opportunity to explore new paradigms/designs choices/technologies.
No one forces you to use this language, like no one forces you to listen to some particular song or some other artwork.
You all seem to not notice something: This stuff is mainly for writing (fast) libraries that JavaScript can use. Try calling Java from JavaScript!
Why are you all crying when a new language comes out? For my point of view designing a language is like art, and often a opportunity to explore new paradigms/designs choices/technologies. No one forces you to use this language, like no one forces you to listen to some particular song or some other artwork.