I doubt there'd be a demand. We are the vocal minority here on HN. I think it's more likely people like us will buy older cars with non 4G/cell based head units.
The average millionaire drives a 15 year old car that they bought new (According to "The millionaire next door"). If you actually maintain your car you will discover that they last a lot longer than most people give them credit for. Some years you put more than the car is worth into it, but other years just an oil change.
Of course we all like a new car. But is it worth the extra money. Folks have a different threshold where they'll give up on ol Barney.