I have a Tesla and I also hold a short position on TSLA. My Tesla is a great car. The best car that I've ever driven but I'm not sure if it has anything that other car manufacturers can't replicate. I think Apple can make an even better car than Tesla if they build the hardware and software like their phones and computers. The idea that Autopilot has some magic sauce that nobody else can replicate is laughable.
The difference seems to be that Tesla was 5-10 years ahead on everything: Minimalistic interiors, modern infotainment, mobile app performance, and of course they lead the way in making electric cars viable by showing that they can both look good and blast off in record time. But you're right that other automakers see Tesla as a threat and are catching up; for example, the range and charging curve improvements on mode…
It really doesn't help when the leadership of said car company is erratic and eroding the goodwill of the brand while people generally feel comfortable with more established carmakers. I feel pretty confident that major automakers are going to be around in 10 years. Buying a Tesla already feels like a bit of a gamble to me just because of its newness.
With an economy that's already slowing it could really hurt them when it's likely fewer people are buying cars and will be more cautious about it when they do. "Maybe I'll hold off another year and see how the new crop of cars compares with the Tesla."