Reassuring until you realize that 0.1% of components of a complex system failing is likely to bring the overall system down. In this case: Individual controlle

Reassuring until you realize that 0.1% of components of a complex system failing is likely to bring the overall system down. In this case: Individual controllers needed to control a power plant or factory, as well as "individual cars on a highway" (once enough break down, the highway is blocked).