system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is 3D printing becoming seemingly more viable for creating mechanical and moving items (such as prosthetic limbs) compared to whatever existed before 3D printing?
gpt
It allows for there to be specific parts made a certain size without having to make a mold to create it in. Quality prosthetic legs are created to fit a persons body part perfectly, and having a 3d printer makes it as simple as designing something with a computer program, and having a 3d printer. The materials and labor involved are almost nothing compared to what used to be done.