The document discusses the S-curve model of technological innovation. The S-curve model describes how new technologies typically emerge and disrupt established technologies over time. Companies associated with established technologies face difficult choices when a new technology emerges: abandon their current business for the new technology, focus on improving the existing technology, or hedge their bets by investing in both. While investing in both seems logical, there are practical challenges to this approach. The document provides lessons on how leaders of current technologies often do not lead the next generation of technology, and how new technologies have advantages like focus and flexibility that benefit attackers seeking to disrupt incumbent technologies.