Another point that some of the more enthusiastic bulls are failing to realize is about market psychology. When a customer buys a top of the line product, they expect it to be top of the line in almost every way (even if some of those aspects/features are not of actual practical use to that particular customer). For example, if I buy the top of the line iPhone, I expect to have the best camera and screen among iPhone models (even if i'm not really much of a camera person, for example). It's simply the fact that I'm paying top dollar, so I expect a superior product. I would not want my top of the line iPhone to have an inferior camera or screen than a cheaper iPhone model.
This same psychology applies to cars, and more so, since it is usually the second most expensive item people buy. People who buy the higher series BMWs or Mercedes expect it to be superior to the lower series in almost every way. Same thing for Tesla. But the differences
@Zaxxon pointed out in his comment above make this claim problematic for S,X. Yes, it is superior in many ways but not in other non-trivial ways. So the reaction is: "if I'm not getting the best that Tesla has to offer, then I'm I'm going to wait or get something else". Again, not everyone will have this reaction, but many will.