We never bought a changing mat and we didn’t miss it - but I kept thinking I should buy one so may do if we have a DC3!
Didn’t buy a crib, fine just to go straight into for (we actually used a travel cot with proper mattress, best tip we got from a friend, so easy to move around bedroom or move to own room when the time comes).
Never bought changing bag, didn’t need it.
Did use water steriliser (for 2 DCs) and DH still grumbles
should have just gone for the microwave one but I kept reading on here how useful water sterilisation was!
Bought special milk bibs and regular ones, but they weren’t helpful, muslins were by far the best.
Wouldn’t do a massive high chair again, would go for a chair that can come to the table or attach to a normal chair.
I didn’t see the point in the carrycot on our buggy, I really liked the idea but in practice was inconvenient - depends on the buggy, we had a hard carrycot so had to remove to fold and awkward to store. For DC2 we just went straight into the buggy seat with a cocoon/wrap (was suitable from birth anyway).
I bought the fussiest bottles, I read far too many reviews and got carried away - should have just tried some standard Avent or Tommee Tippee and changed if I needed to.
Bought a normal baby carrier with DC1 but a lot of the standard ones aren’t ergonomic/comfy so we didn’t use it much - got a Caboo with DC2, big difference, used that loads.
Bought a big footmuff for the stroller, never used it! DCs were always happier with blankets which were easy to stash in the basket. Same for pram liner, got one for DC1 and never bothered for DC2.
This is helpful thinking as we’re thinking about a possible DC3!