That's why you don't see 15 minute cities anymore. Capitalism already figured out that a few large stores allow you to hire more efficient numbers of employees, buy more for less, stock better variety, pass along some of the savings to customers and still make more profit than building lots and lots of repeated commercial infrastructure throughout residential areas. A return to that model would require more employees in low paying service jobs, and would sacrifice lower prices and better variety. Ironically, it would be far faster to use a car to skip from store to store to look for the best deals and the specific brands you want. I suppose we could also get rid of capitalism at the same time, but I'm not holding my breath. As much as I like the idea of walkable infrastructure, it comes at a cost that I am not sure many would be willing to pay.