Failure to Launch

I was talking to a friend the other day who is building a wing on his house so his daughter can have more space. She is 32, has a job, doesn’t pay rent, and now needs more space. I guess in this economy, it is difficult to find work and pay for a place to live, so kids are staying with the parents a lot longer. 
Nevertheless, seems to me it would be better for some of these children who are over thirty if they left home. 
When I went to college at 19, my mother redecorated my room with antiques. When I came home, it was obvious to me that my time at home was over. Now I don’t recommend that type of approach, it probably took a few years of therapy for me to recover from that change.
 However, seems that over 25 and still living at home needs some rethinking. I am sure some people will disagree. Let me know what you think. Just because I’ve lived a long time doesn’t mean I know all the answers. Just Say’n.