Interesting thread and charts that go with .  While I don't really follow all the ins and outs of the conversation going back and forth, and the post is a very long one, I found the charts pretty interesting - and having grown up through the  70's, 80's 90's - up till now - I can attest that much of what is being discussed - based on my own recollection, is correct - at least, as I perceive it.

The weird thing is how we've accepted a chart like this (below) as the status quo: