The author is talking about the reality of the China marketplace. It doesn't matter whether or not the Tesla Model 3 And Y are better than a BYD, the BYD models are outselling them by a multiple in China which has caused such immense pressure that Tesla has had to.massively cut prices to stay competitive in that marketplace (which has led to former buyers rioting at Tesla dealerships in China) so unless you just outright ignore the sales trends in China it's clear that either Tesla delivers immediately a different vehicle to help them recover margins, or their China operations are greatly imperilled. If they are imperilled, the stock valuation which includes growth in China is substantively too high. Literally business 101 at this stage.