Q. Could you say why, in your wonnerfully learned and accurate disquisition, you had to put "1970's" and "70's".
From the rest of your piece, I don't find the logic in the apostrophes.
Another I've noticed is "CD'S"

If we feel strongly enough about it, we needn't lie down and say helplessly,"The tide of opinion is too strong."
I've recently got fed up with broadcasters using "that begs the question", so, rather than accept the supposed inevitable, I fired a couple of emails. Now bbc Radio 4 & 5 have reverted to "raising the question" and even begun using "posing the question". Reeeesult.