Why would I buy a new one if no one will want to buy it from me in 5 years? Sounds like Tesla wants me to buy a new Ford.

Tesla's not the only one who pulls shenanigans like this. BMW was charging annually for CarPlay for a while, and now they're testing the same for heated seats. If this trend continues, people will actually want a checklist of things to ask about, and perhaps a contract that says what features were paid for, how, and whether there are any transfer fees so the new owner can use them. Sad state of affairs.