When I was young I don’t remember people using “formula”. Granted, I was young, but people used milk or made their own homemade concoctions.
Maybe others can comment.
I would guess that most of us on FR were fed home made formula... I have a letter from 1947 from my husband’s birth that describes the formula, somewhere..
and the idea that the powers that be are right now warning mothers not to resort to home made formula makes you wonder...
Breasts are now for only sex and porn apparently.