I think other manufacturers will also be taking responsibility for liability when they come to market. It is just insurance. You can already pay an insurance company to accept liability. The difference with lv3 self drive and beyond is that insurance companies no longer have the data to correctly price their policies, because this is all new and they rely on historical data. The car manufacturers believe they have that data, and are now in a position to take that slice of the pie. I expect that once things settle down, the bulk of your insurance will be paid as a yearly fee to the manufacturer to cover self driving (and the manufacturer will likely offload much of the risk to Big Insurance).
Nobody goes to jail, same as now unless you can prove negligence or intent, there might be significant fines and/or settlement money depending on the jurisdiction. But Iām not sure how is this difference than deaths caused by some design flaw in normal cars.