When it launched in 2010, Norwegian Epic was hailed as the ship that would set the agenda for 21st-century cruising. In some ways, it did: Many of the amenities — extravagant waterslides and a large sports complex, cutting-edge entertainment, 14 food venues, and cabin complexes designed for both solo travelers and luxury-seekers — have appeared on Norwegian Cruise Line's subsequent ships, from Norwegian Breakaway to Norwegian Bliss. And some of the concepts have been "borrowed" by other lines as well.