I doubt this is a factor. As there will be plenty of people willing so sell vehicles if there is a proper market for it and compete with others regardless of downstream effects (make short-term gains and get out of the game, you have yours… that kind of thinking).

If I would have to guess, price and supporting infra are the issue. Here in the EU these things sell like mad, even with the high price… but the development of a dense changing infra is going quickly.