the first place to look for weaknesses is not in the supplier base or distribution or even regulation: it is with the end users. That is why it matters that Amazon is the most popular company in the United States, why Apple and Google continue to have 2 of the most respected brands, and why Facebook is right to be more concerned about the PR effect of its scandals than the regulatory ones. Owning the customer relationship by means of delivering a superior experience is how these companies became dominant, and, when they fall, it will be because consumers deserted them, either because the companies lost control of the user experience (a danger for Facebook and Google), or because a paradigm shift made new experiences matter more (a danger for Google and Apple). In the meantime, though, disruption has its antidote.