As a Tesla owner I’m probably biased, but I do not fear these attacks at all. Thing is, because a Tesla is so connected to the mothership (and I definitely realise that’s both a good and a bad thing), chances of a thief actually being able to use or sell the vehicle are very slim. Tesla always knows where their cars are, and urning off GPS and LTE ruins 90% of the features in the car. I think thieves know this because I haven’t heard of any Tesla getting stolen and not being retrieved (but n=1).