The founder of Dell found ways of delivering Hewlett Packard's most profitable products for much lower prices but forgot to deliver their quality so within a few years had fallen behind again. Ideas need constant renewal. A great idea will never be perfect and will never work perfectly in all markets and all seasons.
Change is not overcoming inertia as much as it is redirecting, guiding, tweaking what already is and what has already happened. We must believe that we can make choices and that those choices can alter the future.