20:48The talk teaches that successful startups often change their ideas, customers, or go-to-market after learning that their original approach is not working. Examples include Brex returning to payments, Goat moving from group dinners to sneaker resale, and GoCardless shifting from consumer bill splitting to business payments. Founders can find better opportunities by speaking directly with customers, testing whether they will pay, and understanding a market before building too much software. The speakers also warn against changing ideas constantly and recommend tracking a clear KPI to tell whether a business is working.
