Most families keep the full travel system going far longer than they need to, mainly because switching feels like admitting the expensive pram was a waste. It wasn’t — but once your baby can sit unsupported and hold their head up in all directions, a lightweight stroller genuinely does the same job for less weight and less bulk.
The main things to check before switching: the seat reclines enough for naps (most toddlers still nap in the stroller until 2–3), the fold is truly one-handed if you’ll be managing it solo, and the basket is big enough for a changing bag plus shopping.
A lighter stroller also changes how you use it day to day — easier onto buses, easier up a step, easier to sling in a car boot alongside actual luggage. If your travel system currently lives in the boot because it barely fits, that’s usually the clearest sign it’s time.