It used to be, before LLMs. It was standard practice though. If you have a bad design that's had contact with reality for a while, it's much easier to make it

It used to be, before LLMs. It was standard practice though. If you have a bad design that's had contact with reality for a while, it's much easier to make it actually good, rather than figure stuff out up front (I've rarely made this work, even though I'd love to).