Micheal heres a little something, an idea, thats not related to history at all, but maybe has an feel to it.
Also not in Rhinos power but in power in some other NURBS apps. like AmapiPro...

o.k. here goes

1. I fillet the upper edges of the cube
2. later on I realize that I have forgoten to maybe fillet one "side" edge. If I try to filet it, I get the "sharp" edge where the 3 fillets met. And thats bad! :-(
3. I want to get smooth transitions in the place where the 3 fillets met, like in the pic.3.


You could maybe make it possible then to choose what kind of meting place you want to get, smooth or sharp...