First 3 kids I have used a convertible seat. Had a normal pram that layed fully flat for NB bubs.

This time round I am opting for a capsule that goes up to 12kg. Isla is still only 10kg at almost 21 months. So I could still have her rear facing in her current seat but turned her about 6 months ago due to her being a right little rat to get into her seat & I honestly think I would have broken her pelvis trying to get her to sit so I could do her buckles up.
So I am confident I will get a lot of use from a capsule. My main reason for goin gthat option this time was I have a kia carnival with what will be 4 kids all in child restraints & it will make it easier to get to the older kids in the back row to do up & check their buckles if I can remove the rear facing seat easily rather then climbing over it.

I personally (only from what I see not experience yet) think that carring the capsule around will be awkward & heavy. I see mums with their bubs in capsules & they just look uncomfortable. So I wont be using mine to carry the bub around in unless I am going shopping or something & can put them in the trolley along with the shopping LOL.

I dont think the pram & capsule would really work for me as I need to be able to push a trolley with shopping etc at the same time. So I would just put the capsule in the trolley.