It used to be that the vehicles in a theme park’s dark ride were along a conveyor belt, and they ran continuously.
You walk on to a moving pathway, step in the vehicle, and ride along.
Then when the ride was over, step out to another moving pathway and exit.
Then came semi-independent vehicles running on an electric power rail on the track.
Finally, engineers designed and built fully independent vehicles that roamed around and recharged at stopping points.
People were amazed and thrilled at the innovation.
Then they left the park, got in their cars, and drove back home.