More and more people are giving up on self driving car tech. If it can't cope with American grid systems, it is going to flounder on more complex street layouts.

See, Steve Wozniak has given up on autonomous vehicles: https://www.extremetech.com/extreme/300927-steve-wozniak-no-...

See also, the magic roundabout in Swindon, UK: https://en.m.wikipedia.org/wiki/Magic_Roundabout_(Swindon) - I'd love to see a self driving car deal with this.

Still, as a philosophical question it has a fairly clear answer. Generally we go for decision-makers as those who are responsible for decisions made. There's a clear line between the vehicles and the manufacturers. The only way I could see it being construed as the drivers responsibility is if people are given control of the risk profile of the vehicle or if they eg install a custom unit to do the driving. Both seem insanely reckless, although I suppose that has never stopped such developments from taking place before..