As a layman, I thought the main issue with 3D printing was the material (the article only briefly mentions this). Plastic goes a long way, but still, when I loo

As a layman, I thought the main issue with 3D printing was the material (the article only briefly mentions this). Plastic goes a long way, but still, when I look at almost non-trivial thing around me, I tend to see more-than-just-plastic.