[giantg2]

Sure, the truly rural people aren't going to farmers markets, but the people in small towns and suburban areas do (this is in contrast to the "big city" in the original comment). Most rural people use a store for most stuff and then go to farm stores/stands/neighbors for other things.

There are still farms that produce a variety of produce. Many of them only produce them as a small percentage of their operation. For example, the dairy farm down the road plants sweet corn, tomatoes, peppers, watermelon, cantaloupe, and (not food, but) manure. I know of several other farms that do similar things.