Brad Frost shows on YouTube and a blog how LLMs (Cursor and Claude in this case) are helping him create, iterate and ideate over web design. He poses a question at the end; maybe you don't need static comps.

He asks for a funky design; it got funky.
He asks for a form; got a form.

My favorite moment was when he had Cursor rewrite the styles to use Open Props; really nice that it can unite values into tokens with reasonable logic.