Thank goodness my children both still have day sleeps. They are totally feral without them ( but they are also feral with them, just the severity of the feralness differs.).

DS will be 4 in 2 months and he still has a day sleep pretty much evry day for an hour.
DD just turned 2 2 weeks ago and still has a couple of hours every morning. She cut down to 1 day sleep well before she was 12 months old and it KILLED me. I could not survive without the kids having a day sleep!!