I think it still is. Fad logsitics concepts (JIT, et al) that are wildly successful in corporate environments fail when LOCs/LOSs are under fire or don't have the structure set up to make them work. In recent memory, the "Drive to Baghdad," while tactically neat, was not logistically sustainable after the push. Heavy units MTOE organized around the newer, untested support structure had to beg, borrow and steal from "legacy" division wedge units.
Why? Simple: the "Iron Mountain" is effective because it leaves little to chance. Decimating support units in favor of more infantry is a good concept if those units don't actually have to be supported. You make that worse when you strip your "tail" out in the hopes that higher-echelon support units will be there to help, and said units aren't on the battlefield yet.
I'm not a cheerleader for bringing back DESERT STORM-era SUPCOMs or anything like that. That said, I've watched the 82d Busborne in action, and I did not like what I saw.
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