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Two problems with the drivelines of modern cars: sensors, which can cause some pretty spectacular mechanical failures; and cost-cutting engineering. Trimming parts to use less material and that kind of thing, but also less investment in QC (looking at you, Kia engine recalls).
There’s truly more to go wrong in modern cars, and the electronics can fail and cause mechanical failures, too, especially in the combustion cycle.
This is the best take I’ve seen yet, with the benefit that it’s literally already been done.
It’d be interesting to see what would happen if they tried to mandate this now, but I’m sure it’s already too late.