Friend,
Well, first, our temps are considerable colder than Western Kentucky. Second, I plow for hours, as I have three 125' drives, and 1/4 mile private road to clear, plus my own place which is 150' double drive, plus aprons, etc.
All on gravel. Believe me, I plow, as I should, with speed. You cannot move that kind of snow we have here without speed. I was pushing 12" on that road. You gotta carry some speed to do it. We are up to 14" and they are calling for another 6-8 when the winds pick up. I don't know how often you get those kinds of snows, but we get them with constant regularity.
The PVC in those temps, and with that abuse, simply is shattering. No big deal. I really am anxious to try the better product, as I love having the tube on there. It just flat out does a better job. I admit to not knowing there was a better plastic and am sooooo grateful for the heads up given by others.