There's a lot of potential for desktop rapid-prototyping with electronics. I think one of the things that is killing us is the tooling. One of the reasons I started building an autorouter was because I wanted to be able to have different "build targets"- e.g. a build target that is a PCB with no vias and only 0 ohm resistors (jumpers). If our EDA tooling supported different build outputs, then we could have earlier prototypes built with less-than-ideal equipment (e.g. conductive 3D printed filament, as the article suggests)