You're an outlier. The vast majority of people neither own nor have any desire to own a 50 year-old automobile.We still own two vehicles that are over 50 years old, and there are many others out there even older. How many "modern" vehicles will still be around 50 years plus after their manufacture?
"Research by R.L. Polk says that the average age of a modern vehicle is 11.4 years, while the average length of time drivers keep a new vehicle is 71.4 months — around 6 years."
Very few people will care if a 2020 Honda Ridgeline is still on the road in 2070. Why over-engineer a vehicle to last 50 years when the average person will only keep it for 6 years?
Do you still watch the evening news on a 50 year-old television?