Looking at the relative mobility chart, some thoughts:
-The South is terrible. The border states do significantly better. TN and KY, both of which have had decent success attracting industry and manufacturing look alright. The traditionally southern state of Missouri has terrible cities (St Louis and Kansas City), but the rest is fine. Texas does pretty well – the worst bits are the most southern in culture (East Texas).
-You can identify the rust belt, but the intensity of economic depression varies by state. Ohio looks awful. Michigan isn’t great. But PA and Western NY are doing far better than one might have guessed, especially on the absolute figures. Same goes for IL. Wisconsin, oddly enough, is extremely mobile, except Milwaukee, which looks as immobile as the worst parts of the rust belt.