I agree that we are not likely to see the 380 or 747 for quite a while.
However, I think the JQ787 will continue to be utilised. It has a footprint that the A321 cannot get near and a cost base that mainline cannot get anywhere near.
Speaking to friends and family throughout this lockdown, many in wealthy, well-to-do situations, has me believing that many travellers will be looking for the lowest fares when things start picking up again. If that’s the case, then the JQ787 is a quite a potent tool.
i also think that, domestically, the 737 won’t bounce back as quickly as it might. Again, many of these friends and family across a wide range of industries, who used to be very frequent business travellers, have stated that Tele-conferencing will be likely to permanently replace a lot of the travel they used to conduct..
PG