I've known someone like that too, and in her case it's because she never had anything when she was a kid. So she can take agonizingly long to let go of anything

I've known someone like that too, and in her case it's because she never had anything when she was a kid. So she can take agonizingly long to let go of anything even if it's obviously ruined or worthless because it might be useful in some undefined way in the future.