[pikzen]

>Jet.com/walmart is something I use already, and often prefer it to Amazon's own shopping. The website is cleaner which appeals to me. Shipping isn't quite as fast, but it's easily something I can live with. Half of what I get via Amazon doesn't ship via Prime, anyways.

This is an US centric view. There are very few services that ship worldwide, with such a large selection as Amazon, at more than reasonable prices, with two day delivery. Amazon is almost irreplaceable because they are the only ones that do it at such a scale. Aside from alibaba, but that means you are ordering in bulk.

[user5994461]

Amazon is perfectly replaceable by the hundred of respective national competitors.

People might have switched to Amazon for price and/or convenience, they didn't forget the local past brand that served them for decade. In some places and some markets, Amazon is not even the leader.