[aidenn0]

I think you're completely backwards on this.

Code folding in an IDE is an example of a way in which text files aren't necessarily static and behavior-less. I see no reason to move away from an underlying representation as text.

[stcredzero]

I see no reason to move away from an underlying representation as text.

A big reason is that otherwise people won't move away from the paradigm of static text files. The best they'll do is text files with little gimmicks attached to them.