But Ford's EEC was built around Toshiba's TLCS-12, the world's first 12-bit microprocessor, developed specifically for engine control, and might have been in cars produced prior to 77, but documentation is spotty.
So do you only drive cars built prior to the late 70s? Because sacrificing the enormous safety improvements just for a bizarre feeling of moral superiority is a really awful hill to die on. And literal death is a real possibility
Or do you not drive and never planned to buy any kind of car and thus your claim is meaningless?
Anyway those are just four of hundreds of computers in your car these days.
My car will not exceed a certain speed if TPMS is malfunctioning.
But then again, I am old enough perhaps to have been taught to regularly check your tires before driving to begin with.
Real TPMS sensors inside the wheel give much more accurate information.
There are downsides, but many boil down to 'manufacturers are knobheads' (data collection, pushing subscriptions) and lessened control (tuning computers can be easier than tuning mechanics, you just aren't given control, so this to is arguably a case of 'manufacturers are knobheads', or sometimes liability issues).
"No antenna/modem I can't readily remove" might be _slightly_ more achievable.
Fuel injector timing and quantity, along with ignition timing, is generally computer controlled, certainly on any modern vehicle.