[fadzlan]

The point is how should such code grows? If it meant to grow on its own, separately on different requirements, then its not duplication. It's just a code that looks the same, for now.

Everything comes with a price. The Clean Code book basically argue on one side, on what you can gain with such practice. It's not gospel, its something that argue on benefits on certain practice. As a developer, you probably are more privy on what is a better trade off based on your project. Do what make sense.

You may default on writing "messy" code, or writing "clean" code, before you find the middle ground that make sense, and thats okay. Its a journey, not a destination. It takes experience to make a good trade off in your daily coding.

Learn from your mistakes and move on.