Apple's strategy assumes that a single company and a single line of devices can indefinitely command the lion's share of the most important computing platform o

Apple's strategy assumes that a single company and a single line of devices can indefinitely command the lion's share of the most important computing platform of our time. This just doesn't seem tenable to me. For every consumer that's completely satisfied with the Apple experience there will be 3-4 others that prefer some other product for any number of reasons. When in the history of the world have we ever seen a single company and a single line of products dominate a mass-market consumer segment for more than a few years?