Wouldn't it be nice if everyone concentrated on compiling JS into an IL/VM type environment (Java, .NET) - so we could extend the <script> tag into other langua

Wouldn't it be nice if everyone concentrated on compiling JS into an IL/VM type environment (Java, .NET) - so we could extend the <script> tag into other languages? JavaScript has gotten so much traction due to the development of Node, which allows a common code base. Wouldn't it be nice if we could have Ruby/Python/Go/ASP.NET/PHP/<...> running on the browser & the server?