The technology has been around, but it isn't deployed to the majority of cars yet.
What I am saying is that self driving technology doesn't have to be perfect for it to change the world.
It doesn't matter if we are a ways away from getting to the "nobody owns a car, and everyone just uses self driving Ubers" future. Because the current, shit accident prevention technology can ALREADY change the world, even if it is "just" by cutting accidents in half and saving "only" 40,000 lives every year.
Incremental improvements that save lives and make driving better are fantastic. Overselling a feature that can kill people is not.