I think coding will follow the path of chess.

In the same way that many moves are too complex to be fully understood by humans, there will be entire codebases made by AI that are too complex for humans. Humans can walk through them and understand what's happening, but they will never have the level of comprehension required to suggest improvements to them.

I can already see that today with some generated code where the AI is clearly telling me, "I can keep all of these different states in mind while developing new features," and you just can't. It sucks to be you.