The seventh continent is what gets most people looking. It's the last frontier, the place that still feels out of reach, and for a lot of travellers it's the final one on a list. What they talk about afterwards is usually different: the scale of the silence, the fact that nothing there is afraid of you, and the way it recalibrates what a landscape can be.
There's a quieter reason that comes up again and again with people who've been. Antarctica is the one continent with no permanent population, no economy and no ownership, run by a treaty. Standing somewhere like that does something to people, and a fair number come back more interested in protecting it than they were on the way down.
None of which shows up in a brochure comparison of cabin grades. But it's why the trip lands the way it does, and it's worth knowing that the thing you book for is often not the thing you remember.