My theory is that a lot of auto mechanics are very mechanically minded, so if the problems start being electrical they don't have the equipment or the skill set to solve the issue beyond simple power.
I saw a video the other day where a Ram truck was having issues on the CAN bus after driving 33 miles and would settle down after 10-15 minutes. The tech was pretty much stumped and pretty much only figured it out by brute force. A capacitor on one of the CAN terminators failed making its capacitance higher than spec and screwed up the filtration harmonics after charging for those 33 miles.
There's also two sides to "reliable" where either it's simple to fix or never breaks down. Always keep that in mind whenever someone is talking about reliability because it's never obvious which definition someone has in mind.
I saw a video the other day where a Ram truck was having issues on the CAN bus after driving 33 miles and would settle down after 10-15 minutes. The tech was pretty much stumped and pretty much only figured it out by brute force. A capacitor on one of the CAN terminators failed making its capacitance higher than spec and screwed up the filtration harmonics after charging for those 33 miles.
There's also two sides to "reliable" where either it's simple to fix or never breaks down. Always keep that in mind whenever someone is talking about reliability because it's never obvious which definition someone has in mind.