A high score on a validation framework isn't a guarantee. It's a permission slip. Here are three real ideas (anonymized) that scored A on the ShiporDrop framework and still died, and the lessons buried in each one.
Case 1: The "obvious" SaaS for solo CPAs
Strong domain expertise. Real hair-on-fire problem (see Hair-on-Fire vs Nice-to-Have). Solid distribution via the founder's CPA network. The product launched, got 40 paying users in month one, and then plateaued. Forever.
What killed it: founder boredom. The actual day-to-day of running a product — support tickets, edge cases, billing disputes — wasn't what she signed up for. She got bored and the product slowly died. The Drive dimension in The 8 Dimensions is there for a reason.
Case 2: The clever AI tool for marketing agencies
Brilliant founder, real problem, beautiful product. Scored 70/80. Died because the founder built nine versions of the product in 11 months, chasing every customer request. By the time he stopped, the product had no clear identity and the audience had moved on.
What killed it: the vibe-coding trap. AI tools made it too easy to ship. He never paused long enough to figure out what the product actually was.
Case 3: The niche tool with no distribution plan
Real problem, sharp niche, fair pricing. Scored 65/80. The founder's distribution plan was "post on Reddit and run Google Ads." Both failed. He never built a real channel and ran out of personal runway.
What killed it: distribution naivety. He scored a 6 on Distribution and shipped anyway. Should have spent two months on the channel before the product. See Distribution-First Thinking.
The pattern
High-scoring ideas die in three predictable ways: founder loses interest, founder builds without focus, or founder ignores the one weak dimension because the others looked strong.
The lesson: don't read your scorecard as a permission slip. Read it as a list of risks. The dimensions you scored highest on are not where you'll fail. The one you scored a 4 on is.