No benefit to prolonged warfare....

There is no instance of a country having benefited from prolonged warfare
- Sun Tzu

Strength training is boring.  The act of becoming stronger takes time, energy, and determination but nevertheless is still boring.  On the other hand, this boring can be super effective at getting you strong.  However at some point, you will not receive any benefits to the program as your body will have outlasted it's adaptability (for now).  

For the most part, strength training is a war.  It's a war against your body.  It's a war against gravity and usually a heavy-ass thing being pulled down by it's forces.  Strength gains can be fast or can be slow, not unlike gaining ground in actual warfare.  Sometimes you reach an area of which you gain nor lose ground, sort of like "digging in the trenches."

Over time, this "digging" leads to a retreat.  It's not to say that you are over-trained, just overreached for a period.  This can ultimately diminish your return and no benefit takes place.  Failure to change the plan or to rest can result in no more gains and just wasting your time.  

Often it's the cycling of different programs and plans that will lead to the largest gains and the fewest failures.  Sometimes it's the exact same lifts as a prior plan, but it's the organizational change that makes the difference.  In all fairness, the main lifts such as the deadlift, the squat, the bench press, the overhead press, and hell, even the pull-up are all the best things out there.  If you can do well in all of these, you're strong in general.  

Strength gains are made by manipulating the sets/reps/weight, and consistently pursuing greater and greater workloads.  They're gained by being patient and hanging on just long enough for it to become ineffective.  Too long and it's a failure and no benefit.  The war is then lost.