Writing for reusability also tends to make software testable from my experience. If you make excessively involved units of code, you can't test, but you also ca

Writing for reusability also tends to make software testable from my experience. If you make excessively involved units of code, you can't test, but you also can't re-use. And I'm big on reusability because I'm lazy. If requirements change, I rather tweak than rebuild.