I've seen "flamework"-style code go horribly, undeniably bad. But if your goal is "simple and fast and damn the technical debt"-development then I have no qualms with anyone who does it.
16 hours. It was a hackathon, I built a mobile app with mocked interactions and flashy UI.
9 hours. Just last weekend, had to build a system to migrate production database data to another db with different schema, right before a very-short-notice-yet-important QA.