Also, tax incentives on new EVs push the used market lower, creating a false sense of depreciation.

I expect the market to reconcile the difference now that EVs subsidizes are ending.

Another possible alternative is that the consumer has to be educated that buying used EVs is not like buying a used cellphone, and that EV batteries do last 10+ years.

They dont seem to actually last 10 years though. Sure, in an old Prius you only care about the battery not being completely shorted out, and the price of battery degradation is slightly worse fuel economy.

However, every time I look at renting a Tesla on Turo, each and every example has reviews with stories about not making 100 miles to the next stop on their trip. These are cars that are only 3-4 years old, not 10.