[epistasis]

A lot of Tesla's customers came to it because of the politics of buying a car that doesn't use gasoline.

Now that other companies are finally catching up (or at least I hope they do), those same customers will have choices. Tesla has really been the only long-range choice, so of course they are going to dominate. They also make a really good car, that makes their customers happy.

Marketing and branding have huge impacts on a lot of car purchases. If Musk narrows his brand appeal by contributing to the US's partisan divide, that has a lot of potential to dent his consumer base. How many of those expensive trucks out there are ever used for truck things? So many car purchases are about image! (Though obviously not all.)