They're level 4 with very severe location and weather limits.
Creating a self driving car which can navigate a dark, rainy parking lot is something we do not know how. Not even in theory. You can't just throw more compute at it. You can't go from a Vickers Type 464 bomb -- one of the most complex bombs in WW II -- to the "Little Boy" by just putting more explosives in there.
I do not recognise the reality you are in.
Navigating dark and rainy parking lots is not hard. At all. Not hard in theory, and not hard in practice either.
We have lidars which work very well in rain. We have cameras with excellent dynamic range. Parking lots are slow environments where everyone moves slowly and you are generally allowed to stop if you are suddenly spooked or need a bit more time to check things.
There are hard problems about self driving cars, but dark and rainy parking lots are not the stumbling block.
Where do you even get this idea?
Let me tell you two harder things about self driving cars: "How many nines do you want in your certainty that the car won't hit anyone?" and "How do you want that proven? With stats or with fault tree analysis, or a mix of both?"
Level 5 driving just means it can drive a child or blind person around who can’t take over in an emergency. That’s the difference between Little Boy and a Moab.
However current level 5 cars aren’t something a consumer would buy. A car that refuses to drive in 99% of situations isn’t marketable. The minimum threshold for that might be a car that can only drive in Hawaii, not a large enough market to pay for R&D, but still plenty use for a blind person living in the area.
No, that's what level 4 means. Level 3 can rely on having a driver to switch to, level 4 can't.
The difference between 4 and 5 is that 4 can park and give up under arbitrary circumstances, while 5 has to be able to keep going almost always.
