For the past 30 years, software companies could "sell and walk away"—whether the customer used it well was their problem. In the AI era, you and your customer are no longer seller and buyer—you are two gears on the same flywheel. When one stops, the other can't keep turning either. Over the past few months, as VENTURE+ has been observing vertical AI, we noticed a clear dividing line: some companies start to "fly," others stay in place.