Earlier quoted context omitted.
A couple other comments touch on the point I want to make, but I feel they don't nail it hard enough: if today you told me you had a website that was 100% technologically identical to Amazon, but you were willing to make slightly less money, you'd still have no products... as a user I'd have no reason to go there, but then without users there is no reason to sell there, so you have a circular bootstrapping issue. Tha…
Amazon (the retail business not AWS) does seem to have a pretty big moat. For starters they have delivery down. In major cities you can get stuff delivered in hours. That is crazy and hard to replicate. They have a huge inventory/marketplace. Basically any product is available. That is very difficult to replicate.
Amazon’s vertical integration is their mote.