Agreed Complexity is a living day truth. I do agree that progess in complexity has to be limited for safety. i.e: there must be some limits(ex:safety factor in civil/mech engineering design, testcases in s/w engg.??) that have to be held for a long enough time. Ofcoures NNT writes for the masses, so opts for limits that majority of people can understand. And that usually is a lot more orthodox.