How old was your LO when they stopped napping on a regular basis?

I actually can’t even remember how old my older daughter was, but she still has quiet time in the afternoons anyway, at almost 5. Probably around 3.5 napping became pretty rare? My younger one is 2.5 and a couple times a week will just not nap, but she stays in her crib for an hour and a half playing with stuffed animals and talking to herself (and getting herself undressed, but at least she leaves her diaper on!). But then after a couple days of not napping she will take 3 hour naps where I have to wake her up because it’s getting so late, so I know she needs it still.