The board vs plywood issue is perhaps a wash. Sheeting must be stronger, but I do wonder about the strength of OSB against plywood and boards. What you save on boards is offset by more installation time. And there is the issue of sealing. After the boards shrink, you'll have a lot of breathing space.
Lumberyard materials are uniform and sorted.
I had to sort my framing materials to optimize their use and weed out the unacceptable. The problem is not the design, but the grade. Designs with yellow poplar are much more limited. My career is spent as a troubleshooter. The insurance issue cannot be over-looked.