Unfortunately it pushed the industry on the wrong path. Now everyone is coming app with transpilable super-sets and some folks are even pushing the unmaintainable code to the previously safe server-side (node, meteor etc.).
Just look what Lars Bak did with JavaScript.
If he would work on the CLR, things could get really awesome.
AFAIK he didn't create those things from scratch, he had to use the Java, SmallTalk, Self and JavaScript specs that were already out in the wild.