"And if dynamic cloth were the norm in DAZ's store, how long would it be before dynamic cloth were the norm in the community overall?" 

I'm sure there's some truth to that. OTOH, it ignores another factor, the perception (real or imagined) that DC is hard to use, which has IMO limited demand. I may be wrong but I don't think there's hasn't been a flood of DC here or anywhere else either. If there were a huge demand for dynamics, one would think that vendors would seek to meet it, whether Daz was or not.  There's always a chicken and egg factor involved in the marketplace but I'm leery of the notion that if only vendors provided something, people would all buy it. IMO, It's never that simple.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken