I have two rooms dedicated to my kids in my house, and my son never even lived here. It’s not his memorabilia, but definitely more his decorating taste. It’s used as a guest room, not even the primary guest room. With him newly launched I wanted him knowing there was always room for him here if he needed it. He actually told my husband he was happy he had a space here. My parents moved when I was 19 and I remember feeling displaced and a bit homeless. I never felt like I had a safety net. Obviously I was fine and I was never homeless, but it certainly was a big kick out of the nest for me.
OP - glad you had the opportunity to have the discussion. This thread allowed me to have the discussion with my daughter.
While I’m okay with living together, to me it needs to be committed and not convenience. I will stand by my thought that a marriage brings stability to all aspects of life and I’m a huge believer in raising children in a 2 adult family.