I didn't use a stroller. I think I actually did own one when dd was first born, because I vaguely remember taking her for a walk in the sling and pushing the diaper bag in a stroller, and I see what looks like a folded up stroller in the background of some of her baby pictures, but I don't see another baby in the apartment.
I used a nojo with her until I was fairly far along pregnancywise with him (they are a bit less than three years apart) and then I switched to a Sara's Ride for the toddler. My son alternated between an Over The Shoulder Baby Holder and a homemade ring sling and I could still put the toddler on my other hip in the Sara's Ride when she got tired.
I didn't have a car until they were 2 and 5, so we walked or took public transportation everywhere. I pushed one of these
for grocery and library runs. It was much easier to get on and off of the bus than the strollers I saw other parents struggling with.
I have a really cute picture of both toddlers sitting contentedly in the shopping cart, which must have been padded with the diaper bag, when they needed to take a bit of a break on the way to the store to get some food. I also remember dd falling down and scraping both knees fairly badly on the way back from the BART station when she was seven (the car must have been in the shop) and putting her in the Sara's Ride while the four year old walked. We got some funny looks and her little feet bumped against my knees, but we made it home okay and she was fine.