As much as I appreciate Short, PStarr, Onlooker and Etp, and understand the Export Land Model points made by PStarr, I have looked hard at the data available on the EIA website, and am unable to see any problems reflected in the refining industry economics.
The following quotes from the latest, 26 April,
https://www.eia.gov/petroleum/weekly/ do not suggest the imminent demise of US refining.
"Favorable product price spreads, infrastructure changes, and abundant cost-advantaged crude oil have facilitated the shift in net shipment patterns." and
"The development of the Canadian oil sands and light, tight crude oil in the United States have provided refiners in the Midwest with abundant, cost-advantaged crude oil, providing opportunities to optimize crude slates, expand refinery capacity, and sell to a wider geographic market,..."
I also don't understand why the Refinery & Blender Net Inputs are compared with Refinery-Only Outputs to arrive at Short's conclusions, and would greatly appreciate more explanation.