The fact that Audi had to write this says that they feel threatened. And while Tesla does only sell one model at a time, they are able to produce cheaper models and sell more of them. As for the question posed by USA Today: There are questions, too, about whether it can keep its order books full, or whether the number of people who crave electric cars is limited. With the new financing offer, a Tesla is within reach…
Never thought about it till now, but that is reminiscent of Apple's product strategy. It'll be interesting to see if it remains this way in the future even after Tesla grows significantly.