Yes almost all modern cars have it to support steering. But if the pump, motor or battery is broken it can still be steered with muscle power.
The nightmare of every car owner is a bricked car which can not be moved anymore, even when its done by towing or pushing.
We also got to try the Neo Steer system, which uses a paddle behind the wheel to brake with your left hand and an actuator for your right thumb to accelerate. This is far less mature and harder to drive anyway, with a much quicker 90deg steer-by-wire ratio. The accelerator and particularly the brake controls were not linear either and it's easy to get in a muddle.
You can pry the accelerator and brake pedals from my cold dead... err... feet.
That presents problems when trying to stop/maintain speeds while turning. Pedals are the better choice. Maybe alternatives for people with disabilities like throttles or something.
to be fair the throttles being in the hand prevent dumbassess from accelerating the car in a turn and crashing in others(but not for brake, keep them down there)
I think the only way to make that system work would be to adjust your driving habits. Not like you should be braking or accelerating at full lock anyways.