My baby slept through at 3mths. I breastfed till 7 mths.
Gotta agree that after baby sleeps, I still have to wake and pump. But I do try to start stretching for longer for the night pumps.
For example, at night baby used to latch 8pm, 11pm, 2am, 5am. Then my baby slept at 11pm to 5am at 3 mths. So I tried dropping the 2am pump. At the beginning, when I wake up at 5am, breasts are very hard because I missed a pump. After a few days, it's better.
At 5am when my baby wakes and feeds, usually he cannot finish all the milk. Then I will pump out the excess. So at least, I am sleeping a good 6 hours.