[CamperBob2]

You just don't hear about all the computers, that's all. There's one on your car's key fob, and likely 100 more in the car. Your coffee grinder has one. So does your dishwasher. And your electric blanket.

[illiarian]

There are 100-150 CPUs in a modern car.

...And also over 100 bugs in the spec that governs communication between car systems: https://youtu.be/hXnS_Xjwk2Y?t=899 (around 15 minute mark)