For average joes today: - Facebook: Rolodex - Apple: Simple, low-hassle, powerful tech - Amazon: Supply chain, low prices, long-tail product discovery, stell

For average joes today: - Facebook: Rolodex - Apple: Simple, low-hassle, powerful tech - Amazon: Supply chain, low prices, long-tail product discovery, stellar shopping experience supported by an tremendous economies of scale, compute, internet infrastructure - Google: Search, email, maps, productivity software, compute, internet infrastructure For as long as these companies remain dominant in these categories continue to provide value to customers, they will not be replaced. They continue to grow exponentially in major part because of the very real value they provide and the lack of viable competition from outside of these groups.