I co-sledp with LO since birth too, now 26 months old and still co-sleeping :) He refused baby cots and playpens, so we just co-sleep since it helps him feel more secured - there are times he wakes up to peek for me, and also times where he feels better just rolling to my side of the bed!
I'd say there's no real need/rush to move them to their own beds - I wouldn't stop until the day that he tells me he wants to sleep alone :)
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