314 million in the USA.
Conservatively 780 out of 790 still on the road or in the country.
That's one car for every 402,000 and change for each person here.
Take care of it and you'll see minimal depreciation and perhaps a nice bump in value in a couple of decades. It's not a 1989 Porsche 911 Speedster, but it is rarer. If you want it to remain collectible, then I think you will have to keep the car largely unmodified.