MEM has a lot more going for it than CVG in my opinion. One major factor is FedEx. Whether people believe it or not, Fred Smith would have something to say about a MEM base closing, considering over half of his pilots commute into MEM on the airlines. Also MEM doesn't have nearly the amount of winter weather that CVG goes and so it operates very efficiently all year around. And yes, MEM is further from ATL than CVG is from DTW, and ATL can't handle any more flights. I see MEM growing as a regional hub with some west coast flights remaining and maybe even some int'l flights on top of the current Amsterdam route. Just an opinion, but I don't see MEM closing.