Tanay built a 72% habit-forming product that changed how millions compute. In 12 months, Wispr Flow went from side project to 40% MoM growth, beating OpenAI's model, while staying obsessively focused on one thing. Inside: how to build products people can't live without, why focus kills you if you lose it, and what happens when a 28-year-old founder thinks from first principles instead of copying Silicon Valley playbooks.