FedEx won't be leaving anytime in the near future. KC hit the nail on the head about the employees. Many of the people I work with have no desire to go any farther than what they already have. FedEx just recently acquired the ANG property. I've also seen plans for FedEx to add another sort building to the property, relocating several of the GSE lots, add additional parking for truck trailers, add more GSE equipment in general, building a walkway over Democrat, like the one over Tchulahoma, iirc, as well as several other things.FedEx has also shut down several of their other hubs throughout the US which routed more freight to the Memphis hub. Some locations weren't shut down entirely but only work a few days out of the week and Memphis picks up the rest.
Fred Smith won't be going anywhere anytime soon.