Thankfully they haven’t given control of the steering to the computer. My newest car does have computer-controlled braking in the name of “automatic stability control.” I know for sure that the gas pedal does not connect to the engine except via the computer.
It’s the push-button start ones that are the scariest. These are the ones that have had runaways as there is no key to switch off. Still, I’m not completely sure what my key switch actually connects to... whether an ignition cutoff or just the computer.
I’m sure the key is just sending a signal to the powertrain controller. Which controls the ignition and fuel systems.
So really no difference if you have the “button” or a key to turn on.