Incumbents needn’t be victims of digital disruption if they recognize the crucial thresholds in their life cycle, and act in time. Here are the four stages of digital disruption from the perspective of an incumbent. The reality is, most industries are still in stages one, two, and three. That’s why the early experiences of media, music, and travel companies can prove so valuable. These first industries to transition to a digital reality highlight the social and human challenges that by their nature apply to companies in most every industry and geography.