I find these concluding lines of the piece to be the most compelling.
no matter how clearly one thinks, it is impossible to predict precisely the character of future conflict. The key is to come close enough to be able to adjust as new challenges to security emerge. (Mcmaster, H. R. (2008) 'On War: Lessons to be Learned', Survival, 50:1, 28)
The point made here is the need to be flexible. And flexibility applies as much to one's thinking as to one's force structure. Until reform of the "personnel manglement" systems inculcates a selection bias towards flexibility and innovation as character traits, I suspect we will continue to see material solutions and organizational structures that are as agile as 200 car freight train negotiating the Tehachapi Loop.