Maybe I'm getting cynical with age, but ....

I don't miss it either, but now I own every computer I fix so it's not limited to autos.

I also get the "I forgot to ask him this when he was here, so could you have him call me when he gets home?"
"I don't know how to resize my pictures" or some other crap that they think they are going to get free help with.

That's why I don't do side jobs anymore. Once you touch it, everything that happens from then on is "your fault".

I just tell people I work on servers and they're "different".

There's a LOT of the diagnostic end that's VERY similar between cars and computers.

A lot of what people are paying for (and don't realize) is the expertise for the diagnoses.
Actually changing the parts or making the fix is usually the easiest part.