My 19mo only uses his paci at naps, night time sleeping and the occasional flight. He doesn't ask for it during the day and he knows that in order for us to take him out of the crib, he has to leave his paci. It's been working and especially nice to have longer stretches of sleep after the newborn/infant phase. Also having a paci on long-haul flights is great when he's not quite distracted by tablets yet. When did folks get rid of the night paci?