Carnival Cruise Line had to evacuate Grand Turk early due to incoming weather. This was during Hurricane Ernesto, and Carnival Magic needed to leave the dock before the storm arrived. Such situations are rare but they do happen,

Carnival Sunshine will arrive at the terminal for its first cruise on Feb. 11, said the director of Norfolk’s Half Moone Cruise and Celebration Center. This will be the start of year-round

Sustainability has become a goal for the cruise industry. Passengers generally support that idea, but they're generally not willing to be even slightly inconvenienced to make it happen. That's not true of every person sailing,