Sometimes even the instruments are maintained. I know a consultant whose job is to repair bespoke factory and laboratory microcontrollers in situ. When we hired

Sometimes even the instruments are maintained. I know a consultant whose job is to repair bespoke factory and laboratory microcontrollers in situ. When we hired him he spent two weeks covering our lab in blueprints, two weeks troubleshooting, and one week programming. 25K to fix the device, but much cheaper than a new one.