Norwegian Epic arrived in 2010 and split opinions immediately, which was probably the point. The curved hull profile added 40% more ocean-view staterooms than any comparably sized ship. Those curved corridors, the wave-wall bathrooms, and the split-bathroom layout (sink in one space, toilet and shower in another) were deeply innovative and heavily debated. Epic also brought the first full-scale Broadway productions to sea (Priscilla Queen of the Desert, Legally Blonde) and the duelling-piano energy of Howl at the Moon still has no real equivalent across the rest of the fleet.
