Indeed. A great article. Not because its right, because its not, but it very well describes the problems with the entire subject.Very few, but enough in Afghanistan to motivate people to take a look at alternative cartridges.
I don't agree with this guy's conclusions, but he describes the problem nicely:
(Spoiler: He really, really likes the Grendel)
The situation in Afghanistan was arguably unusual, in that opponents were engaging from beyond the effective range of 5.56x45mm but the ROE constrained the use of artillery. In a peer conflict, there would be no such constraints.