Explore the world of legacy code in this insightful conference talk. Discover why legacy systems are crucial to the functioning of modern society and learn effective strategies for working with outdated codebases. Gain valuable insights into understanding the history and evolution of legacy applications, and develop the confidence to add features, fix bugs, and improve performance without compromising existing functionality. Delve into topics such as virtualization, refactoring tools, continuous integration, and managed deployments. Learn creative ways to leverage common technologies like DNS for more productive development environments. Explore techniques for bridging the gap between automated testing and systems monitoring, and discover how to improve visibility and transparency in production systems. Uncover the potential of legacy codebases and gain a new perspective on working with established systems that continue to power critical business operations.