Of course compiling to JS as CoffeeScript does is itself the answer to the IE issue. If and when there is a new JS one could conceivably compile the new JS to o

Of course compiling to JS as CoffeeScript does is itself the answer to the IE issue. If and when there is a new JS one could conceivably compile the new JS to old JS for IE users. It adds an extra burden on dev teams but IE special cases aren't anything new to web devs and it allows the standard to move more quickly.