Amazon created an experience where the consumer is empowered with information and reviews about millions of products, can quickly buy those that are most appealing, and can easily understand when they will arrive and how they can be returned. It's provided a seamless and empowering customer experience better than any other players in the space, and its comparative advantage has hardly narrowed over 20 years. Amazon introduced features like Prime, which seemed destined for failure at first, but became popular with shoppers because the retailer encouraged, rather than hampered, the habit of going to its site first to look for products. Prime created an economy of scale around purchasing from Amazon that's led to billions of dollars in extra revenues. Amazon seems confident that this habit, no, this way of life, cannot be threatened by adding in a few off-site conveniences.