If the changelog to my car's safety critical system was limited to "misc bug fixes", I would never touch it again. Either have extreme transparency into the system, or don't have the system.

I leverage this complaint against my own car. The AEB radar just stopped passing start up self tests for a while, and I had no idea why, and could not find out without going to the dealership. While waiting to be able to do that, it started working again. I don't consider it a backup, or a helper or anything. It's an independent roll of the dice for an upcoming crash that I already failed to prevent. If it does anything in that case then that's probably an improvement, but I don't exactly trust it to save my bacon.