Explore strategies for effectively managing legacy code in this insightful GOTO Book Club interview with Michael Feathers, author of "Working Effectively with Legacy Code," and Christian Clausen. Discover techniques for improving performance, functionality, and reliability of legacy systems. Learn about the impact of AI on refactoring, defining legacy code, using debuggers, advocating for testing in organizations, breaking boundaries during refactoring, balancing time investment between fixing and avoiding legacy code, and the concept of scratch refactoring. Gain valuable insights applicable to various programming languages and platforms, and understand how to navigate the challenges of working with large, untested codebases.