> DND Shades are physical hardware, but they can be distributed as pure information. I think that’s pretty neat.

This strikes me as an interesting idea to highlight.

I work in a structural steel fabrication workshop, mostly buildings. Everything we fabricate is distributed as pure information. It's not as though the customer has to bring in an identical model for us to copy.

I can't think of anything that can't be distributed as pure information in the sense written above .