That's what I was complaining about; non-commercial production EVs could be much easier to repair than any other vehicle type, but they aren't. Car manufacturers, for both combustion and electric vehicles, can and do lock out components to prevent end users from servicing and repairing their own vehicles. If modern batteries and IGBTs existed decades ago, we would have had a period of mass-produced electric vehicles that were as easy to work on as a Model T. Really, electric vehicles have existed since the Model T, but none of them ever sold well, because they were to slow and had too little range.

People DIY their own EVs all the time, and on the electronics side all you need is a battery, a battery management unit, a charge controller, a motor controller, and the motor. Some of those parts can even be integrated into a single module If your combustion-powered car is fuel injected, it probably needs just as complicated of computer systems as an EV. (with the exception being rare cases of mechanical fuel injection)

The rest of an EV drivetrain is the same as any combustion car, except the transmission can be much simpler or may not be needed at all.

If an electronic components dies within one of those modules, swapping it out is no more work than swapping out something like an alternator or a starter. If the motor itself needs replacement, that's much, much easier than swapping out a combustion engine. Most electric cars have motors small enough that a single person could lift and carry one. If your motor controller died, you might be able to fix it with board level repair, just as you could rebuild an alternator yourself, but almost everyone working on a vehicle, whether DIY or commercially, is going to replace it, with either something new or something repaired/rebuilt by a specialist.

It's possible to get EVs with cheap components that won't last long, but it's also possible to get components with good design and build quality that will last a lifetime. Combustion engines, on the other hand, are regulated into designs that have extremely high efficiency when brand new, with no care for their long-term performance, so pretty much any modern consumer combustion vehicle has extremely fragile piston rings that begin leaking almost immediately, making for much shorter lifespans than decades-old combustion vehicles.

Driver assist is completely unrelated to the fuel type and open-source solutions do exist, that work on both combustion and electric drivetrains.