Imagine you’re in aircraft maintenance and a mission is scheduled to fly in the next 24 hours. You need a part that hasn’t been manufactured in more than 30 years. A specially-commissioned replacement is available for $15,000, but it will take a year to arrive.
A technician tells you he can get you the part by the end of the day for less than $500. When you ask how, the answer is shocking: He’s going to “print” one.