The Shape of Things to Come...
i.e. different parts of the technology chain arguing that "it wasn't me guv".
What it needs is a couple of major motor insurers to stand up and say "on the present showing we will not be quoting to insure automomous vehicles". They are not under any legal obligation to provide insurance cover, so they will either refuse to quote or will come up with outrageous figures that will put everybody off.
The technology companies involved are going to have to learn that they either stand by the integrity of their product (if it has any) or they drop the idea of participating in any further developments.
"The Law" (both criminal and civil) is unlikely to tolerate a state of perpetual obfuscation generated by various component makers, including those who write the software. Neither the "victims" of traffic mishaps nor the drivers of the vehicles involved (including those in non - autonomous vehicles) should be expected to cope it either. Justice delayed is justice denied...