In the inner city... it was like a revolving door... new markets would go in and wouldn't last a year... simply to much shrinkage and slip and fall suits... now it has spread to "Better" areas.
On that point, and reading through this thread, reminded me of a conversation a long time back (circa 1990) with a guy I worked with. He was describing a driving trip stateside with a friend of his; they went to buy beer. Stopped at 711 (or equivalent) store. His buddy goes up to the door (daytime), it won't open. Had to use a high-security large turnstile on the front of the store - say what you want on the intercom, drop money in, wait for the turnstile to rotate back with the case of beer and change.
At first, they thought it was a scam, never ever having seen a store like that. They got their beer, but laid down tracks fast out of that neighbourhood....
There can be issues at the delivery-end, but that is another advantage Amazon has - no customer physically on premises to cause trouble amongst product on-offer.
Rgds, D.