Perhaps so. Personally my PCM(s) has given me repeated issues. But my point is that a computer and sensors detract from a machine's ability to be easily repaired. If there is an element to a machine that is not easily repaired I consider it a weak point.
"Redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system." We carry multiple sources of air, spare tires, hoses, fluids, etc etc. Almost everything can be repaired or bypassed. While it may be true that people have gone decades without problems, that does not technically mean that a computer doesn't detract from our normal habit of redundancy. The same is almost true of an automatic transmission, although technically it could be opened up in the field and rebuilt. And I suppose you could carry an extra PCM that's programmed to your vehicle.
Hasn't anyone ever heard someone say "In the old days you could fix your car with a couple of wrenches." ?
