I said neither; I was using examples to make my point. I said that just buying a cheap wood blade is a completely useless waste of money for a box builder, because if you spend good money on one that will last for years, the blade will pay for itself before you realize it. You could cut MDF with a hand saw if you had to, but again, that saw will be hopeless afterwards due to the resins that MDF is made with, and as such you'll end up buying a new saw if you want to have the cutting power of the first time.