DS is three year's old. He sleeps in a "big boy" bed and is getting more and more grown up.
We are still using a baby monitor. It is an old-fashioned radio-type that transmits all the time (not like these new digital ones that only switch on if there is crying). Therefore, every evening we had a soundtrack of listening to DS snoring. DS snores VERY loudly (I think he has a sinus problem but that's a question for another day) so it's very intrusive. However, if I turn the volume down to be less intrusive, DH is unhappy because then he can't be sure it's loud enough to hear if DS needs us. He has to have it loud enough so that we can still hear the snoring over the soundtrack of whatever other noise we have on such as TV, music etc.
Our house is quite solidly built and you can't easily hear noise from another part of the house. It is true that IF DS woke up and IF he called out something like "mummy I need a wee" or "I want my blanket" (he regularly kicks off his duvet while asleep) then we wouldn't hear him at first without the monitor. We would probably hear him after a while IF he got distressed enough to shout in a more sustained and loud way. However, most nights (at least 4 out of 5) once he is asleep there is no need for us to go up again.
DH says he doesn't want to get rid of the baby monitor until DS is old enough to get up and come downstairs and fetch us if he really needs something and it is important. I reckon this wouldn't be the case until about the age of seven.
So - when did you get rid of the baby monitor, and what did you do to ensure you could be summoned if you were really needed?