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There's a lot of truth in your list!
I add the following point:
The car manufactures didn't get to the point yet where they recognize that just mechanics can't do the job in the garage anymore. What you need meanwhile are educated engineers, at least one per garage. I believe it's useless to train a mechanic in electrics/electronics/system behaviour if that poor guy doesn't have the required knowledge base. The effect of the current situation is that most garages do just dumb research in form of expensive parts replacement in case of a failure rather than analyzing the problem in a proper engineering manner. So I vote for engineers in garages!
PS: in my 23 years of driving experience, I had only one puncture (along with a full size spare tire).
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