Did he? He recently said the stock was too damn high, but I guess some investors only followed what Jeff Dahn has been working for the past few years (cf. what Reuters is just revealing but you can learn about his results elsewhere too). They expect Tesla's financials to keep improving thanks to price reduction and performance improvements, while competitors realize they haven't even started to dip their toes in EV technology.

It might be too late for the rest of the industry, but this has nothing to do with the recent stock price (this is about battery technology and production ramp, something that very few journalists/analysts have covered correctly while Tesla kept increasing its lead).