True enough, I guess nothing applies to everyone; everyone's genetics, muscle composition, etc is different... but if you do 5 sets of 30 with 6 plates per side (just grabbing a random number) you may grow... bunch the sets closer together and increase the intensity and they grow some more... but I think that eventually you would have to add another plate or two lest you plateau out on size, no? I know you don't have to lift massive weight all the time to have muscle mass, but here's an example of what I mean:
An old friend of mine, a multiple time Mr Tennessee, always said about legs: "If you can do 20 reps with 315 you'll have all the size you'll ever need."
He did that, and had great wheels... but in order for him to gain the ability to do 20 deep reps with 315, he had to do fewer reps with a good bit more weight. I've seen him use 495 from time to time. I know we don't need to do maxes for bodybuilding, but I do believe that once in a while ya gotta load up some heavy ass weight, grab it, and growl..