The airbridges deal with (b) they will remove the 14 day quarintine for countries with low covid levels.
I agree people won't be rushing back here that's I assume why flights won't be back up to their normal number for a long time. But things will have to be eased back to normal otherwise the economy is ****ed.
As good as video conferencing is for certain things nothing beats a face to face meeting. Business trips won't be at the same volume they always have been for a while but they won't disappear.