I disagree that a'99%' level won't get good enough for legal liability. Let's say normal human drivers make an error once every 10 miles, but Tesla's FSD makes an error once every 100 miles. The obvious choice is Tesla FSD even though it is not 100% perfect, and in fact it is 10 times better than a human driver. They might even make it illegal to drive without FSD once it becomes widely available. In the end all the speculation about how good it is or can be means absolutely zero because the results will be created in the end by insurance companies or Tesla, which has it's own insurance company. If it actually is causing more crashes, insurance companies will start charging higher rates, less people will buy Tesla's etc. But we aren't seeing that, with FSD already out there, the insurance premiums for Teslas are not skyrocketing to cover all the accidents. I sort of glossed over this but Tesla also provides insurance which guarantees at least one market participant in FSD, if they cannot make money insuring their own cars FSD will fail, if they can make a profitable insurance company insuring them then FSD will succeed.