I used to live less than 100' from a small grocery store and it was awesome. I really missed that proximity once I moved and had to drive to the store again. It was a genuine timesaver.
I've thought I should open a suburban bodega right in the neighborhood. But with lot sizes being fairly large and households being fairly small, i doubt I would get enough traffic since I couldn't compete with discount grocers and Walmart.
C'est la vie, I bought a muscly convertible to enjoy these interstitial commutes.