Well, how do you measure "successful"? I mean, welding machines are pretty damn useful and they're definitely successful tech. Yet you don't exactly see one in

Well, how do you measure "successful"? I mean, welding machines are pretty damn useful and they're definitely successful tech. Yet you don't exactly see one in every home. Part of 3D printing's "success problem" IMO is that people started using a hopelessly ambitious definition of success.