Originally Posted by
Germany_chris
All missed my larger point..
When you reduce to the absurd nothing changes i.e. little to no difference between a 1948 bike and a 198x bike because they were lugged steel, cars obviously didn't change because they have a similar number of cylinders and 4 wheels.
But there have been long periods in the history of the car where there weren't fundamental technical changes. The US auto manufacturers were largely technically stagnant during the mid-1950s to the mid-1970s (or so) for example, most of the innovations being ones of styling during that period. "Innovation" at that point was basically let's see how big we can make the car, or how much engine we can pack into a little car..