His "reasons" why the Cheyenne was cancelled are nearly made-up.
Just to name one problem: the Cheyenne's systems were analog electronic or mechanical. The digital revolution was hitting, with chips replacing vastly larger, heavier systems. That's why the AH-64 was so much more advanced in so many ways.
Again, that's just one thing. The Army being completely dissatisfied with the progress of flight tests was another ...