I’ll fill in the part between OPs story and “then they all clapped” that he left out.
He’s likely talking about “Save As”ing or scraping the DOM for rendered HTML/CSS and feeding that to an LLM to convert to actual in app wired up components.
eventually you will be able to generate a database schema/api by just feeding saas app html to an llm. you wont get everything, but you will get close
Add in presumably ignoring the license of the scraped documents.