More than 70M cars are produced worldwide every year. The 3 large German producers, Mercedes, Audi and BMW, are producing around 6M cars, of which many are priced similarly or more expensive than Model 3. That's just to mention some of the larger ones.

There is easily a demand for millions of cars within the upper end of the mid price segment like Model 3, and once the price of batteries goes down just a bit, EVs can reach the lower end of the mid segment.

We are not at the cheap segment yet, but it's just a matter of battery prices going down (through economy of scale; we actually don't need any breakthroughs in technology).

Then factor in charging networks. Right now, I don't have any supercharger near me. Next year I will. In 4-5 years I will have plenty.

As for not trusting the traditional manufacturers, I stopped buying Nokia and Ericsson and never came back, ones Apple marketed the iPhone. Not because they had had bad products or weren't trustworthy anymore. Just because it was obvious they produced the old tech and were behind on the new. People stopped buying horses and carriages when Ford produced his cars. Horses served us well for millennia.

And the hundreds of thousands of Teslas already driving billions of miles on the road are still driving well without the engines and expertise of BMW, right? People trust Tesla's tech now.