“The biggest value that I get from this challenge is that if he would have failed I could have moved on into the next thing without any issues.”

A 10-Day Build Challenge Forces Objectivity — Failure Costs Nothing

Fernando imposed a hard 10-day deadline on his MVP, which removed emotional attachment before it could form. A short sprint means sunk-cost bias never kicks in: if the idea fails, you pivot fast instead of defending months of work. He explicitly says that working 6-12 months on a product makes it 'easy to get attached' and 'hard to hear the product sucks.'