[FabHK]

> the industry was selling 10x the number of GA planes it does today, so I imagine 10x more were flying as well.

I'm pretty sure most of these planes from the 1970s are still merrily flying around!

The wikipedia article on the 1994 General Aviation Revitalization Act has a graph showing the astonishing drop in shipped aircraft (and the rise in unit cost!) since around 1980:

https://en.wikipedia.org/wiki/General_Aviation_Revitalizatio...

[n_ermosh]

yep--we want to reverse that trend. And you are probably right, a lot of those 70s planes still fly today. hopefully we can replace them with better alternatives