It is nowadays, and it is in RF and digital electronics, but that’s far from universal.

I mean, yeah, that’s what he was getting at. How 70 years seems like a long time in the context of modern technology despite being very short in the sense of human history.

Only recently! For the past 10,000 years a 70-year span would not see a single significant change.

(If I mix this up, someone correct me.)

I think it was at Olduvai, or somewhere in the Great Rift Valley, that hominids spent 600,000 years hammering out the same exact stone tools.