[nitrogen]

Not over the past 100+ years, no, but between two years ago and two years from now, yes. Further, this isn't a change that is not "optimal for every single [one] of them," this is a change that is significantly suboptimal for the majority of students.

[roel_v]

May be, we don't know; if you have data or (somewhat) robust theories on why and how, please tell. My point was that your 'proof' wasn't proof at all for your stated premise. I suspect this will be hard for you, because I don't have rational reasons to believe that such a sudden drop-off is happening. I don't really know though, I'm just trusting on an abstract 'common sense' approach; the best I have in situation like this where objective measure are not available (to me).

Anyway please feel free to share your theories and data on why you think that over such a very short amount of time the level of education will take a sharp drop-off.