Nice explanation of Hook's Law, Dewey.

It's in the manufacture of springs that the statistical evidence of failure is most observed. Coil springs are easier to make, more consistent in result, and thus cheaper, than v-springs.
It's prudent for a maker to choose an item that has a much lower likelihood of failure during destructive cycling tests.

You can buy boxes of springs guaranteed for many millions of cycles for a fraction of the cost of a box of v springs. It's just a more advanced, standardized technology.

I purposely leave out every other reason why another type of spring might be chosen or used other than dependability.
Money flowed into manufacturing coil springs, not as much into v springs.
One of our job shops makes us coil springs to spec in a couple hours. And that includes their runners time back and forth.

Out there doing it best I can.