This four step qualification of risk is one of the smartest models I've seen for evaluating/validating startup progress. I've been through multiple businesses,

This four step qualification of risk is one of the smartest models I've seen for evaluating/validating startup progress. I've been through multiple businesses, and seen them fail at all these different hurdles, for the exact reasons you elicit here. I may have to steal this model for my latest pitch deck. Bravo.