I'd say the 3D printer is an example of my point. You can design and think in 3D despite the manufacturing process being layered. In contrast, chips are designe

I'd say the 3D printer is an example of my point. You can design and think in 3D despite the manufacturing process being layered. In contrast, chips are designed from a 2D standpoint. As an example, does the ALU circuitry span layers or is it just on one?