there’s actually an extension now. If you move your cruise with a placeholder the placeholder is now being extended to 4/2022. It’s under a new program called flexibility booking (something like that). Most folks are unaware. I booked 2 cruises recently outside their expiration dates and once the placeholders are applied to a cruise, they get a new expiration date. I read 4/2022. Its still a little fuzzy right now, but it worked for me. I have 2 cruises to move and waiting for the next release to move them to spring 2022. I did confirm with my TA that this might be possible unless it changes before then.