It does neglect that one overarching design goal was to not be encumbered by any IP. That means you have to pick your solutions exclusively from expired patent

It does neglect that one overarching design goal was to not be encumbered by any IP. That means you have to pick your solutions exclusively from expired patents and, no, you don't get to be clever and come up with new things along the way because, again, you risk one of the behemoths raining hellfire down on you.