I'm sure glad I am a "mechanical type" and know electricity/electronics!
Lately I've had a lot of repair work to do with my car and a new/used truck I purchased.
More and more vehicles are more electronic than electrical, but no problem if you know how these things work.
(Then many consumer products I purchase lately do not work out of the box. They need to be repaired or modified to work properly. I guess quality control is a thing of the past now? Anyway no problem for me! I just redesign the thing so it works.)
As to the vehicles, I've been poking around a few automotive forums lately and it is quite interesting to say the least! Go visit some of these and look at the electrical questions/answers!
The very newest vehicles now have data communications between various components including the radio. Or have electronic audible warning sounds connected to the car speakers via some sort of interface. And some of this stuff is quite important that it work, so self testing is built in. No factory radio on the data bus and the car will not start!
In the past people have replaced their factory stereos with an after market stereo with no problem. Now they do this and mess up the works!
Or they go and change the tire sizes on trucks without taking into account that the speed of each tire feeds into a computer. Then they have trouble!
Or they add electronic gizmos to a wire - any wire which works, then have problems with fuses blowing. No attempt to determine the amperage capacity of the circuit, how much amperage is being drawn by existing components, and how much amperage the new gizmo will draw.
To top it all off, automotive stores are still in the 60's with the multimeters they sell. They only have a 10 amp capacity. Yet vehicles commonly have 15, 20, and 30 amp circuits these days! So how is any consumer supposed to be able to measure these circuits using the test equipment available to them via their auto parts store?