I see big advantages and big disadvantages of the current electronics in cars.
On ignition advance control, I've seen centrifugal/diaphragm vacuum advance seize, jump from full advance to none and back again. I've helped repair a car where the centrifugal weights had overrun their end stops, and jam the distributor, breaking the camshaft drive.
On a mid-1990s Fiat, we had the vacuum sensor fail. A light lit on the dash, and when the new sensor arrived, my wife, who would struggle to change a wheel, was able to fit it. No adjustment was needed. Also the car has no distributor, and when a coil failed, it still drove on 3 cylinders.
That car has a mechanical speedo, and changing the speedo cables when they have worn out is a bloody nightmare. The speedo cable also makes getting the speedo out quite tricky. An electronic one would never need a new cable and doesn't impede getting the speedo out.
So those are all wins for electronics.
On the other hand, the electric windows and seat adjusters that won't work unless you have the ignition on. You can only operate the starter once each time you turn on the ignition, the headlights turn off when you turn off the ignition, so you flash the headlights between stalling the engine and restarting, confusing other drivers.
Air bag lights that won't turn off if a fault has been repaired, cars that need to be dragged to the dealer if you leave something running from the cigar lighter, immobilisers that rely on radio signals that can be interfered with, or fault reporting that is cryptic, vague or just plain wrong.
Those are all car manufacturers shooting themselves in the foot.
However car manufacturers manage that quite easily without the use of electronics.