I wonder if part of the effect can be explained by the improved aerodynamics of cars. I used to drive a 1966 FJ40 Landcruiser about 10 years ago and remember ha

I wonder if part of the effect can be explained by the improved aerodynamics of cars. I used to drive a 1966 FJ40 Landcruiser about 10 years ago and remember having to clean bugs off the car. I don't have as much to compare it to as you since I've only been driving since 1996, but I didn't notice any major difference in that time period.