I think they may never happen because full self-FLYING “cars” (vtol drones) will very likely happen first (it’s more a regulatory thing than a tech thing).
And flying would be superior to driving (faster, no traffic, no need to maintain infrastructure, etc..) so there’d be little incentive to continue even trying to get to level 5 for self-driving.
I really like this take and I would love it to come true, but I have some doubts. Fully self-driving cars could probably eventually be accomplished with our current level of hardware (we just need much better software), but flying cars would require decades of continuous improvements in the hardware required.
And flying would be superior to driving (faster, no traffic, no need to maintain infrastructure, etc..) so there’d be little incentive to continue even trying to get to level 5 for self-driving.