Dd is 2.5 and I have never used a monitor for her. Obviously when she was tiny she slept with me downstairs and then in my room. But since moving into hers I’ve never had one. Even when staying in my parents much larger house (I have a 2 bed terrace) and in the garden I just popped inside to check on her.
I’ve seen that parents are still using them at 7(!!!) am I in the minority?! Did everyone use a monitor and I’m just a slack mother?! Yikes.