I find this thread very sad and upsetting.
I am myself 25 years old and still living at home. I have no plans to leave at the moment, as I know I couldn't cope, and I don't want to. I get terribly lonely and I know the loneliness of living alone or in a houseshare would kill me. (I lived in a houseshare at university and even though I got on with my housemates, it was still the loneliest time of my life, the loneliness was terrible).
I don't have any friends and would hate to live with strangers.
I suffer from depression and had a very bad breakdown last year. Luckily I'm much better now, but I'm very mindful of my mental health and don't welcome any stress. My mum is my best friend and we are very close especially since last year (the one good thing to come out of the breakdown).
No man has ever been interested in me or wanted me. If I ever have a boyfriend, of course it would be a dream come true to live with him; and of course it would be easier because there would presumably be two incomes coming in.
I do find that most people who move out early move out because they have met someone and fallen in love and want to be with them.
One factor in the breakdown was me feeling worthless and that I had failed because I wasn't married, with a baby, in my own house. I still sometimes feel embarrassed or that my life has not turned out the way I would have wanted it to be, and I will never really get over that. But now I also know that the most important thing is to be a good person and just go through life doing the best you can and not worrying about meeting other people's expectations - people who are strangers and don't even care about my wellbeing or the wellbeing of my family. They just have their opinion, and that is that.
So, you may think it's strange for adults to live with their parents, but I think it's strange for people to be so judgemental and unkind and ungenerous in their opinions of others' choices. You may think you know their reasons and their circumstances, but you never really know their true circumstances or situation.