An AI demo and an AI product are different things.
An AI demo proves you can produce an impressive result on inputs you chose. An AI product has to produce reliable results on inputs real users bring — the messy, the unexpected, the adversarial — affordably, at scale, every day. The demo is a weekend; the product is the company. The gap between them is evaluation, retrieval engineering, the product around the AI, observability, and cost control — and almost none of it shows in the demo that got everyone excited. The most expensive mistake in AI product development is mistaking the demo for the hard part.