> Waymo had no choice but to solve the expensive problem of "Always Available and Safe"

And it's still not clear whether they are using a fallback driving stack for a situation where one of non-essential (i.e. non-camera (1)) sensors is degraded. I haven't seen Waymo clearly stating capabilities of their self-driving stack in this regard. On the other hand, there's such thing as washer fluid and high dynamic range cameras.

(1) You can't drive in a city if you can't see the light emitted by traffic lights, which neither lidar nor radar can do.