For a long time, people thought of writing software as a process of accretion: To add new features, we should be mostly adding new code. But good developers know that, often, the fastest way to add a new feature is to change the code to make it easy to add. Software should thus be never thought of as “done.” As new capabilities are needed, the software changes to reflect that. Those changes can often be greater in the existing code than in the new code.
