The tech part of the car, is, what, maybe 33% of its price? So for the price of the car to remain just stable, the price of tech has to drop at 3 times the price of inflation. That's what, 9% per year? Very ambitious, and not supported by recent history.
And thereafter the problem is that the tech portion of the car becomes smaller. Let's say after 8 years, tech prices halved, and now tech is 15% of the value of the car. Then the tech prices has to further drop by 18% per year to keep up with inflation of the rest of the car. Not going to happen.
Sooner or later your tech value is insignificant and the price of the car is purely based on raw materials and manufacturing cost. And the price will go up.