[masraum]

Originally Posted by aigel

Tesla and many other cars already are able to move the steering wheel with software. So, you don't need steer by wire to have this functionality. Even in basic self drive mode, Tesla will do all the steering for you from their software to the wheels.

Yes, Tesla and other cars can do the steering. But if that steering fails, there's still a physical wheel that's mechanically connected to the front tires that allows you to steer the car (or if the car is not running or has had an electrical fault, dead battery, etc...)