To sell the more on offer, of lesser quality, therefore disposable, required more square footage at retail. The first expansion was not in building new stores, but being open more hours. In my youth, all stores were closed on Sundays. Everything. So the first expansion came in a change where stores began opening on Sundays. Womens' liberation provided the divorced moms to staff the Sunday open hours.
Macy's is now cutting back hours, 10-6 in Many stores, fewer hours Sunday. They are not tearing down buildings, but there are less Square Feet at retail open hours. Someone oought to be tracking this.
I noted Bank of America branch with hours of 10-6 daily and 10-1 Saturdays. Here again, before say 1973 banks were open 10-3 Mon- Thu, 10-6 on Friday (to accept paycheck deposits) and closed Ssturday. Anyone who knocked off early from worked was accused of having "bankers hours." Banks had to expand to handle all of the credit for a consumeristic society passing through their branches. As the consumeristic credit society dies, less hours are needed.
There are opportunities here. Macy's already leases out shoes, books, jewelry, carpets, etc departments. If you have a good product or range at retail, approach the local store manager about setting up shop in their store. Drive a hard no-risk-to-you bargain. Figure they earn 6% of what passes through the till. Based on your sales, this will often be better than they do.
I am writing in coffee shop now. It's independent and its hours are 7-3. That means the whole operation is closed, and available from say 4-midnight. Test out your new idea without a $250,000 up front store investment. Use the excess production capacity of retail square footage closed. Fix your offer, and then later go into your own digs, with a customer base ready to follow you.