It&#x27;s no problem to autopilot on the highway today, 90-95% of the time. But that number needs to go even higher, still, before it can be unleashed on the public. And for that last edge, sensors and software have to get better. As a guess, going from 90% to 99% is the same effort as going 0% to 90%, software and hardware wise. Luckily, these diminuishing returns are (somewhat) offset by more resources being poured into development, and hardware costs coming down due to volume manufacturing.