I'll say it again. I think Tesla has made a major design error by relying on the tiny 12V battery to start the car. They have not designed in a backup to the 12V battery, so when the 12V battery dies, the car cannot be started and is in fact completely unresponsive. And has been proven with all the dead cars due to the faulty battery batch, owners have ZERO warning that their 12V battery is about to die. At least in an ICE, you can hear the starter battery struggling to start the car for a few weeks before it finally dies giving you some warning. Tesla could have created a simple backup DC-DC converter as a backup to the 12V battery. They could have eliminated the 12V battery entirely, and used two DC-DC converters. Or as a final backup, they could have exposed some 12V battery terminals so that the Tesla could get a boost from an ICE or external 12V battery for when the 12V battery dies.
From where I'm standing right now, unless Tesla is willing to replace all owner's 12V batteries on an accelerated time schedule (like every two years), it is almost a guarantee that we will all have a dead model S at some point due to the 12V battery failing. It is just a matter of time.