Dtank, the point needs to be made that if I were, for example, to take a race car in a trailer behind my RV to a race that had a trophy in some state, I would be "commercial" in that state. That would make me illegal. If I did the exactly identical thing in Ontario where my license was from, I would be 100% legal in every way. So your statement:
"Reciprocity would apply *if* you were doing "whatever" within the limits of your home state (or province, country) Driver's License."
will no longer be true. Big change. Hence the need to discuss and explore this new rule.
Brian