Indeed it's more like live-rewrite; features are still wanted but the rewrite heavily influences them as they go so it's juggling a lot of balls at the same time.

Fable 5 was amazing at helping me with that. Opus 4.8 is... good, really good, but... you have to be on your toes _all_ the time. It gets tiring. But as already explained: it also helped me become better.