Well it can depend.
Something can no longer be commonplace, even though it once was, without being anachronistic.
In any case it is intended to be a light hearted thread where the title not being accurate, to whatever degree, hardly matters.
I absolutely agree. 548 replies says other people do too... (I am amazed that our resident classicist hasn't weighed in with his greater mind and education, but never mind!)
Various "new old" things pop into my mind at odd times of the day or night, but I have usually forgotten them by the time I come to post... How about children arriving at primary (infant) school accompanied by parents - i.e. mothers - exclusively on foot, and after that walking to junior school in small groups of friends without a parent?
Did anybody else learn "country dancing" at junior school (age 7 to 10?) It has stood me in good stead!
"Music and movement" (BBC prog) being played for us at infant school and BBC schools radio science programmes (accompanied by a black-and-white pamphlet) in about 1964...
And most sadly, at infant and junior school, a cohort of ageing/elderly unmarried women teachers who lost their boyfriends and most of the potential stand-ins in the 1st World War.