Like it or not, carbon emissions are going to be the biggest single drag item post covid. Upper atmosphere carbon emissions will be a real talking point, and the fact that world has largely adapted to a massive reduction in seat miles will be hard to refute. I expect that 2019 will end up the high water mark for global aviation.
On another note, Chinese agrarian and market customs have given us three corona viruses in 19 years, and two influenzas. I would be planning for another pandemic (real or feared) in the next ten years.