We've come to realize that GM/Cruise's "self-driving" cars will require a vigilant, highly-trained safety driver to be onboard, for the foreseeable future.
GM/Cruise's software is inadequate for reliable unmanned operation and the progress needed to overcome this deficit appears to be intractable.
Tesla is building systems that assist the driver. Driver and autopilot together are better than driver alone. This is a viable product, in contrast to full autonomy.