1) Your room is typically not ready right away depending on when you check in on the cruise. You then need to sit around with a big carryon.
2) On the day of disembarkation, they send you off to eat breakfast in a dining room as they start loading people off... and you have to carry your carryons with you. It's a little cumbersome to carry a Tri-Star through the dining room. ...of course that said, it also means you don't have to finish packing the night before because you don't have to leave your Tri-Star in the hallway for the crew to process at night!