On the point of unable to travel, a ‘simple’ solution would be to retain / gain status on a pro rata basis. Eg if Qantas deemed 1 January 2021 as normalcy and say you you needed 1200 to retain platinum, then they should only required 1/12 per month of remaining membership year to retain for the next Membership year to (month) 2022. There will be lots of winners (meaning Qantas losing perhaps), but it might not cost Qantas that much until it starts to fully service/fulfil all the benefits of each status.