Um isn't that what Lisp and its children / siblings have been all about. I've written a bit of Closure it has a very clear idea that code is data and data is code. Your code is trivially serializable in your mind and by various tools, and because it is lisp - it all kinda makes sense.

I really wish we lived in a universe where a lisp became the lengua franca of the world instead of javascript, as almost happened with Netscape, but alas ...

The "code is data" aspect of lisp seems orthogonal to how code is still written as text, and btw lisp is still written using text. You still need to indent all these parentheses.

Virtually all programming languages are parsed into ASTs, and these ASTs can be serialized back. This is what formatters/"prettifiers" usually do.

Did I miss something?