NZ are the boy in the bubble. With many countries not attempting to eradicate this virus and neither a vaccine nor an effective treatment on the horizon at what point can they reopen to the rest of the world?
NZ can reopen travel borders gradually to countries in a similar elimination position with similarly excellent trace and isolate systems. Australia looks likely to achieve elimination and they are NZ's largest trading and tourism partner. Taiwan. Dare I say... China, the second largest trading partner. Trade borders are still largely open.
The virus seems like to continue to ravage Europe, the UK and the States in waves and genuine herd immunity will likely never be achieved until a vaccine is created. So NZ is not in such a different position to everyone else in needing a vaccine or effective treatment... just with exponentially less death, mental health issues, everyday fear and probably a more stable economy.