One thing that does not get mentioned here too much is that the more skilled the athletes, the quicker the body (mostly CNS) will adapt. A novice can generally perform the same program for months on end, whereas an elite athlete may need to rotate exercises practically every week.
That being said, there are still individuals who can grind away at the same program week after week, month after month, and year after year, like Coan, Bridges, Gaugler, and since my son does not read this, I will put him in the same group.
On the off chance this gets back to him it is probably due to his lack of imagination.