Well, I've got a double baby jogger in the garage - that I prob ought to sell - but I did buy it with the thought that my friend and I were going to start running together - and we would be able to do this when the kids were at school and our babies were in the baby jogger (we both have babies approx 18m old)!.....so far we've talked plenty about the running but not done any!
Then I have a Mura 4 - in daily use for the school run - the pavements in my locality are pretty rough - so anything with little wheels just isn't that good....
I have loola for weekend outings with the family (because we have 4 kids and the mura won't fit in our zafira anywhere once the kids are all in their seats! I can't use this one every day as it really really doesn't feel right reversing it - and it needs to be reversed up a slope and some steps to get into our house - I think it might break if I did it daily with the loola (only has single back wheels that "splay" out if you reverse - has anyone else noticed this effect?)...
I have a tiny (only cost £25!) old volo - that I lend to the grampies if they need to borrow (for visitors or carrying picnics/coats for my lot - they never take the baby)... It wouldn't be worth much if I sold it - and it's the only one they can cope with the folding system on (simple)!
FWIW I don't have a car myself for daily use (haven't even passed my test yet anyhow), and I walk 6 miles daily for the school run -also in kids holidays we mostly use public transport so I need the loola for that too).
I just feel quite guilty about having more than 1 pushchair sometimes - I have tried (bought and sold a LOT - at least 50! - but mostly 2nd hand or on bargain sale) loads and this is what I have now....
I also use slings when I can but the last 5 months my back has been so bad (dr thinks maybe slipped disc) and having tried wraps and mei tais - sometimes I can get away with them - but other times I can barely stand up straight - and I still have to go out for the school run - having a pushchair to hang onto can help a bit.