The original topic was: "It's official: developers get better with age. And scarcer."

I was answering the posted question "Is there any other career where this would not be accepted as a given?".

So my post was that for teachers it is not accepted as given that they get better and scarcer with age. I did not make a statement whether that was true or not, just that it was not accepted as a given. In support of my view I would offer the numerous recent news stories calling for the end of last-hired, first-fired rule when laying off public school teachers.