FinTech case studies matter because the industry repeats itself: the same adoption curves, the same partnership tensions, the same unit economics traps recur across payments, lending, and wealth. Why fintech case studies beat fintech theoryTheory says financial innovation diffuses slowly because trust moves slowly. The most instructive fintech stories are usually two years older than their coverage, because that is when the operating data comes due. Case two: the neobank pivot to business accountsConsumer neobanks dominated headlines, but the durable economics surfaced elsewhere. Case three: robo-advisors and the trillion-dollar quietAutomated investing was declared dead repeatedly: too cheap to profit, too cold to trust.