I breastfed both of mine to begin with and then had to exclusively pump for one of them, (ds), from about 4mo, due misdiagnosed tt and then total breast refusal. So I did quite a bit of research on this whole pumping vs bf vs ff issue.
I think tbh, the differences between each are probably marginal.
I read an article which said it should be seen as;
Formula = good
Donated milk = better
Expressed BM from the mother of the baby = better still
BF = best
I would agree with that. Obviously, everyone would probably pick to do the “best” option, but there are many reasons why they can’t / don’t want to.
There are things in breast milk that cannot be recreated in formula. So I do think there’s a difference, albeit not a hugely significant one, between feeding BM and ff.
I also think I saved money by pumping. I hated making bottles of formula with powder, and breast milk comes ready made, obviously. Plus it keeps for ages in the fridge and even out of the fridge, unlike open bottles of ready made formula.
So, for me, no, I may not as well have switched to formula immediately.
I’ve also topped up both of my dcs in the past with formula btw and ds switched totally to formula at 11 mo, so I know of course that formula is not poison or anything. I’m totally for it, if it’s the best option for the family.