Google has never written software before that causes people to die if it fails. It's a very different thing from other kinds of software that you just reboot if it is acting funny.
That is exactly I would not trust firmware written primarily or entirely by Google. For all the talk of clueless EEs writing code in this thread, I have horror stories of clueless SEs messing with hardware.
Umm, you can A/B test a new logo or colour scheme. You can't A/B test a collision avoidance algorithm. What makes Google a successful ad platform doesn't translate to making them a good safety-critical engineering company.
