Companies stumble for many reasons, of course, but one of the most common is that the very management practices that have allowed them to become industry leaders also make it extremely difficult for them to develop the disruptive technologies that ultimately steal away their markets.
A strategic inflection point is a time in the life of a business when its fundamentals are about to change.
Disruptive technologies typically emerge in insignificant markets that industry leaders don't care about.
Good management was the most powerful reason they failed to stay atop their industries.