Not much use unless they all implement it... Might be more interesting if V8 would support CS as an input language to compile natively in addition to JS -- thi

Not much use unless they all implement it... Might be more interesting if V8 would support CS as an input language to compile natively in addition to JS -- this would have CS "natively" in Chrome and Node. But then, things work fine as they are. Compiling CS to JS is not a huge performance hit and it's either part of your build chain or a one-off hit at your apps startup.