Sounds like slow and steady progress. Seat belts weren't even mandatory until the late 1960's; more common sense than technology. Cars could go 100k miles 50 ye

Sounds like slow and steady progress. Seat belts weren't even mandatory until the late 1960's; more common sense than technology. Cars could go 100k miles 50 years ago. They aren't going 10x the distance today. Progress to be excited about: Wright Brothers flew in 1903, Yeager went supersonic in 1947, and we were on the moon in 1969. Commercial flights were crossing the Atlantic at 2x the speed of sound in the 1970's.