this is incorrect. Teslas have very little depreciation. Trying to buy a preowned or used is still very pricey. At least at this time. I think people that buy 100k car are less inclined to care about the after market value. The people probably also don't care to service the car themselves. Even at 40k I think this probably still holds true.
This is mostly due to pent up demand from very wealthy customers who are not price sensitive. When Tesla (or competition) can satisfy new car demand and start selling to less wealthy consumers, the story will change