> But today you can do even better, with AI can do true waterfall by rewriting from scratch many times.

This does nothing other than ensure you end up in the "joy" of running a v0.0.1 product but for years on end instead of for a few months.

I hear this sort of thing a lot, and I can't help but internally translate it to "I've never had to take oncall for a product directly after a rewrite". It will be broken; not even because the AI is "wrong", but because the rewrite has new edge cases. No one rewrites a project to have the exact same edge cases. Those edge cases will become outages. No one will learn anything, because a month from now it will be rewritten and those edge cases will get swapped for something else; you can pick which edge of the CAP theorem you want to live on, but you can't pick "none of them".