[mossgu]

You're right it still matters, but I'd reframe why. Good code used to carry design intent — readable code told the next person why things were structured this way. When AI writes the code, that's gone. The code works but it doesn't explain itself. So where does the "why" live now? Not in the code — that's disposable. Not in the prompt — that's throwaway. It has to live in something upstream that the human owns. Something formal enough that you can regenerate the code from it. Your point 3 is the key one. Software is never done. But "easy to change" requires knowing why it was built this way. That knowledge used to live in the code. Now it needs a new home.