[raverbashing]

Really, really

GWT is not the answer, Dart is not the answer, not writing JS is not the answer (maybe CoffeeScript but I'm skeptical)

JS may have its warts, but in the end that's what browsers understand. That's what you'll have to know to debug things.

And the browser doesn't have to execute 2x, 3x the code, and use more memory as well

If you want something to help my perception is that it should be a thin shin (like CS) rather than "full bells and whistles" on top like GWT or Dart