Not sure if I agree with what the TA indicated. Lot's of countries have put barriers in the way of people flying "freely", at least internationally, even though they don't have the restrictions on leaving the country like Australia, many have substantial barriers (two weeks in quarantine, at own expense) that discourage a lot of travel. I'd say Singapore, NZ, Thailand, Vietnam are all countries where people aren't flying internationally, and that's just to start with. (And I more definitively say, Singapore is one country where people aren't flying right now).
Domestically of course is a different story, Air NZ in their earnings release today, had a slide summarising domestic traffic Jan 20 vs Jan 21, and those figures show New Zealand with the lowest decrease in available seats (excluding China, which IIRC had already restricted domestic travel in Jan 20), with 80% of seats available vs last year, US @ 58%, Australia @ 50% and UK at 16%
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