We'll invent other tools to help with the mental models, ones that are more intuitive.

Imagine being able to walk into a house and see immediately the leaks dripping from the ceiling, the clunky layout and smell the stinky garbage that hasn't been collected.

We're already in a sort of IDE when you think about it, we're operating a much larger mental model than any code-base, and we rarely remember that we're operating with such a model.