Here’s something I hadn’t thought of in quite this way (but many others probably have): In a living city, space is cheap enough so that people with wacky (often “terrible”) new ideas can test them out, while wealthier people in that city search for wacky new things to try out (because they’ve experienced a lot of other things). In “creative” markets, such as for art, the demand side complements the supply side across income groups in an interesting way.