There are many reasons why people don't want to leave South Africa, chief among them the outstanding climate, the friendly people, and the laid-back lifestyle. But when you talk to anyone who's made their home in Johannesburg or elsewhere in the country and ask them what they'll miss most about South Africa one day, I'll miss Woolies will come up almost immediately.
What I miss from the U.S. in terms of one-stop shopping is made up by the existence of many smaller specialty stores in South Africa. You just have to get used to the idea of having several stops on your grocery route, and perhaps never quite checking everything off your list. In addition, South Africa gives you Woolworths, perhaps its single most perfect feature.