I have my kids stuff in boxes in a closet (they are in their 30’s). Their excuse was “I live in a rental when I get a house I will take them”. Down 3/4 - shipped one child’s to Oregon last year, one in Miami and one just closed on house in California yesterday. I have it all ready to clear out.
So good for him not hoarding it. I have a feeling mine will move it one time and then toss if they are like me. My motto is I don’t want my kids to have to throw away my crap.