People will die if GM/Cruise takes the safety driver out of the car. Anyone familiar with Cruise Automation's software will agree to this statement. Hopefully Waymo has done a better job.
Waymo does nearly 5500 miles per disengagement, GM seems to be at about 1200 or so as per the California submissions for 2017. Of course this does not tell us the quality of the miles - it is easier to achieve a lower rate of disengagement on the highway for example, but perhaps it serves as an indicator.
All others testing in California are 300 or fewer miles per disengagement.
All others testing in California are 300 or fewer miles per disengagement.