NPR explores why older people have a hard time letting go of their possessions. This, in turn, makes it harder for people to move into more age-appropriate housing ... it makes for a vicious cycle.
My house is already filled to capacity. I am not an older person yet, but it does give me pause. We moved to this house from a larger house three years ago, and we did significant downsizing to make that move successful. But we are likely to acquire more stuff as our kids get older ... what's the solution? Buy a bigger house? That seems to be a move in the wrong direction.