I have become very used to reliability. I have a 13+ yr-old Tacoma and a 9-yr-old Forrester. Neither has had a single mechanical failure. The only “failures” my truck has had is a headlamp and the battery.
I’ve had a drive by wire system for five years now. It’s great. Haven’t had any issues with it. They’ve gotten a lot better with programming.
Early drive by wire systems had some issues. I’ve become a pro at diagnosing 2007-2013 Chevrolet truck drive by wire systems. It’s usually a bad throttle body control motor or the pedal sensor.
They have redudancy. The system fails safe. The throttle still works. It just feels like you have a bad misfire because it’s not accurately telling the computer what the throttle is actually at.
I’ve never seen a drive by wire system fail completely on a vehicle. Normally it’s a single channel failure. The car drives like ■■■■ but it still works. And most manufacturers set the computer to put the car into limp home mode. So you see that warning and your speed is restricted.
A friend of mine has a Honda Ridgeline pickup truck that had the keyless ignition sensor go out. It not only sidelined his vehicle for about three weeks, it cost him $1000 at the repair shop once the replacement module finally came in.