Software is read far more often than it's written, and it's changed many times over its life. Complexity taxes every one of those future moments. A simple design that a new developer can grasp quickly saves time on every edit and onboarding.
Simplicity is a discipline, not laziness: it takes effort to find the clear, minimal solution instead of the first tangled one. Favoring it, and resisting unnecessary abstraction and cleverness, is one of the strongest predictors of a healthy codebase.
Updated July 2026