Tesla said on Wednesday that it would build a factory in Mexico to manufacture an electric vehicle that would be significantly more affordable than any of the cars it sold now. But the company disappointed investors who were expecting it to make big announcements about new products and strategies.Shareholders and analysts had expected Tesla to reveal information that would clarify how the company would retain its crown as the world’s dominant maker of electric vehicles in the face of energetic competition from established carmakers and relatively younger Chinese manufacturers.Instead, company executives offered a seminar on its manufacturing processes, supply chain organization and software. The message was that Tesla is eons ahead of other automakers in technology and efficiency, on track to someday prod …
