> ... market power refers to the ability to raise prices above what is truly competitive, which they certainly have to some extent while not being a monopoly.

Have they really, though? I mean, a Maserati is also priced very highly. Certainly much higher than what is "truly competitive" for a luxury vehicle. But I don't think anyone would call them a monopoly. Likewise, Tesla is selling a unique product within a class, and some people are willing to pay more for that product. In other words, they have a product with a competitive advantage, and that allows them to price higher than the competition. This is healthy and normal elastic demand. I mean, price was a big reason the Model 3 presold in a week about three times the entire Model S volume.