People don't really appreciate that enough. It's mostly solid state electronics. The only major degrading part is the battery. Its currently not too cheap to replace, but it is highly recyclable. Fix the battery and the car is basically new. The drivetrain will last for a long while.
I'm sure they will be engineered to a certain life expectancy, but I'm interested to see how long they will end up lasting in modern automotive applications.
They operate in extreme conditions though, so that's certainly a factor.
Then there are the little things breaking everywhere. A light here (leds improve that), windshield wipers, maybe a broken cupholder. These are also not impacted by the drivetrain.
In general though, a car breaking down frequently, or one that constantly gives the owner trouble when they are trying to go somewhere (failing to start properly, etc) is much more problematic. They will end up in the dump. This is where I was aiming my comment at.