Just so no one mistakes the above as hyperbolic, musk actually said this during an engineering meeting. His engineers kept telling him why Tesla needed the extra sensors, and he replied "people just have eyes and they can drive."
Anytime someone tries to play him off an engineer or anything but a lucky gambler and flim flam man, just remember the above.
Pre-prod is ideal, but a pipe dream for many. Lots of folks barely get prod.
We still stagger patching so things like this only wipe some of the critical infrastructure, but that still causes needless issues.