Explore strategies for migrating legacy codebases to React in this 23-minute conference talk from React Advanced Meetup. Learn how Twitter's TweetDeck team successfully introduced React to their complex, decade-old application, overcoming technical debt and diverse coding paradigms. Discover techniques for handling migration challenges, adapting existing code, and leveraging React's benefits to improve development speed and efficiency. Gain insights on choosing between top-down and bottom-up approaches, managing implicitness, and applying general lessons learned from TweetDeck's React migration experience.