The resale market isn't shaped by technology but market demand which you frame it narrowly to what you place value on.

Otherwise there is no reason for old Porsches and 90s Japanese cars to demand the sticker price they do now.

The people who are willing to pay more for a used car down the road aren't interested in EVs or mass produced ICE cars, if unique enough will continue to be in demand over EVs

ex) New porsche EVs losing value against ICE cars

FWIW: Porsche depreciates just like any other car EXCEPT the 911 (and other GT variants) which is a rare outlier. But your point stands.