Code Design Principles

Emphasizing the importance of creating new classes rather than modifying lengthy methods, Steve advocates for the Open/Closed Principle to enhance code maintainability. He highlights the Dependency Inversion Principle as a means to decouple code from infrastructure, facilitating easier unit testing. Additionally, the DRY principle is discussed, underscoring the need to avoid redundancy by ensuring that each rule or setting exists in only one place, thus preventing cumbersome changes across multiple files.