The manufacturers are all going to start locking features behind subscriptions. Things like heated seats, navigation, phone integration, performance, etc. will be premium features with a monthly fee. You may even pay extra for better audio or things like that. If enough people tolerate it, you may even end up with subscriptions for things like the sunroof.
Once all of that is in place, they'll include X years of subscriptions in a new vehicle, so the first owner doesn't really notice the increased cost if they get another new vehicle after X years.
As a secondhand buyer, I have to pay a non-discounted subscription for (ex) heated seats if I want that feature. The value of the heated seats won't depreciate alongside the car like it does now. If anything, the cost will go up.
That means the resale value of the car for the original owner is lower. They're selling something closer to a base model, even if they had all the premium features unlocked while they owned the car.
On the dealer side, they'll make it attractive for the original owner to trade in for a new car and it'll likely be by adding some incentives that revolve around the subscriptions because they don't really cost anything to activate, but they have a lot of value to the vehicle owner.
That will have the effect of consolidating used car sales to major dealers who can offer better value with less cost than 3rd party or private (used) sellers because they can add value via subscription incentives with (near) $0 cost.
The total cost of owning a vehicle is going to increase significantly in the next decade and a huge part of that is going to be done by leveraging post-sales subscriptions to damage / monopolize the secondhand market.