Old cars from the 60s and 70s were great looking but mechanically junk.
In the bad old days, cars were equipped with four wheel drum brakes. Today we have superior 4 wheel disc brakes with ABS.
In the bad old days is was common for a car to start rusting after 2 to 3 years. I owned a 1977 Chevy van. Surface rust appeared after one year. Rust through after 3 years. Today's cars just don't rust.
In the bad old days one started to think about replacing one's car after 5 years or 60,000 miles. Usually the body was rusted and the engine was using oil. Only cars I serviced with 75,000 plus miles were used by salesmen. And those cars were only 3 years.
In the bad old days, on a damp day it could be a 50-50 chance of a car starting. Today's cars always start. Always.
In the bad old days is was easy to work on a car. Why was this bad? Cars always needed work. In the old days cars needed tune-ups. That meant a trip to the auto store for a set of points, condensers, rotor and cap, spark plugs, and spark plug wires. This was done about every 15,000 miles. Cars today just don't need tune-ups. Spark plugs last 100,000 miles or more. No points to change and set. No spark plug wires. No cap and rotor. Why is this so bad?
Today's engines are oil tight, unlike the leakers of the past.
Today's cars are built to much higher quality than the junks of yesteryear.
I went on a short trip of about 30 miles in a friend's 1969 Camaro convertible. 4 speed trans mated to a 396 cu. in. engine with 375 horsepower. Car got about 8 miles to a gallon as it wheezed and creaked its way down the highway. Amazingly good looking, but junk under the skin. My Hyundai Elantra is about as boring as it gets. Will run 80 mph all day in quiet comfort and returns about 34 mpg.
The old cars were great looking, but were very crude under the skin. New cars are worlds better in terms of design, engineering and quality.
BTW, cars of old were produced on assembly lines as they are today. In the old days, you NEVER shut down an assembly line to report a defect or quality issue. Today any worker on an assembly line can stop the line to report a defect of quality issue. And you want to go back to the bad old days?
NEVER, NEVER, NEVER!!!
Edit to Bandit_60
I work in a steel mill in the USA. All the cars made today have much better quality steel that the junks of the 60s and 70s. Cars just don't rust today. Imagine a car being scrapped after 5-6 years due to rust? Also, the Japanese and Korean companies that have plants in the US use domestically produced steel in the bodies. We sell to Honda, Toyota, Hyundai, Subaru, and Kia. I don't know if we sell to Mercedes.