A little farther into the future we will have macro, micro, and even nano fabrication machines. Consider the work currently performed by an ant colony. Artificial ants with mandibles capable of removing or adding a speck of metal will swarm over a chunk of stuff, creating a part. Service and repair are all about uptime. Over the past half century, machines have become operationally more brittle.
Modern machines are more likely to just suddenly stop working.
Just picture the difference in failure modes between an old oil-filled 2500 rpm spindle and a new 25,000 rpm spindle with critically metered lubrication. Future machines will continue this trend, for two reasons. As the physics of the machine become more extreme, typically as a result of high performance issues like speed and acceleration, when something goes wrong it often leads to catastrophic failure. The other reason this trend will continue is because of increased sensing and monitoring of machine behavior. When something appears suspect, we automatically stop the machine.