obviously a very little child thinks of their situation living with their parents as the only natural state of affairs, and considers it very much permanent. I don't think its unusual for a small child to plan that they will marry one or other of their parents when they are old enough.
obviously an older teenager is usually beginning to feel the constraints and annoyances of having to live with their parents, and only puts up with the oppression because of the free taxi, laundry and catering service, but is very much open to the idea of one day being capable of being independent.
what I don't know is what the "normal" transition between those states looks like? at what age would a child start to change their feelings from one to the other, and are there "half way" points in the development between these states?
DS age 10 isn't neurotypical so "normal" doesn't apply to him anyway but I don't know to what extent his current feelings are totally to be expected for his age whatever. DH mentioned the idea that when DS is grown up he will leave home, just in passing while talking of something else. it seems to have deeply traumatised DS to have such a concept mentioned.