We wouldn't put up with having to take our cars back to the dealer to have required maintenance done that would take away some feature or option we paid for, let alone having the maintenance leave the car in a troubled or non-working state.
A friend of mine is an Audi technician and claims if you purchase a re-map for your cars ECU, some manufacturers will reset it back the the factory defaults (or maybe some minor upgrade) when you take it in for a service. So you may well lose something you paid for on your car.
Compare that to Sony...
...or Apple. Who would likely blame the affected users for not buying the latest hardware every year.
"Neighbors!! We got neighbors! We ain't supposed to have any neighbors, and I just had to shoot one." -- Post Bros. Comics