Brian, I made a pretty good living in the 80's and 90's fixing feedback systems that other mechanics couldn't (or wouldn't) repair. I also taught a new generation of trainees not to badmouth the stuff, just learn to work with it, and make it run the way it was designed.
We're into the third generation of feedback systems now, and they're MUCH more sophisticated than those early electronic-controlled carburetors. My son just completed GM technicians' school, with a straight-A average, so he's following the family tradition of going to the top of the mechanics' trade. My father started repairing cars in 1939, and ran the shop in Nashville, Tennessee in the 50's and 60's with the top technicians in the city, so that's the only way I've ever known to fix cars. No shadetree wrench jockeys in our family!
Jerry