Originally Posted by
Badenoch
Alternatively, the lines could reflag any of their vessels currently in American ports and ply their services within the U.S.A.
Actually, it's not as simple as that. The PVSA requires the ship to be built in the US (or at least a certain part of it) and a certain amount of the crew to be US based, plus complying with US labor laws etc. So it wouldn't just be reflagging, there would need to be some action by the US government to make it possible.
As to closed loop cruises, yes I would do it, just to be on the water in any way I can. I don't know if enough people would though to make it feasible.