Regarding the immediate retirement of the 747s - I remember after 9/11 Virgin retired their fleet of 747-200s only to have to lease them back from Air Icelandic (?) when the predicted downturn wasn't quite as bad as predicted.
There's got to be a chance of history repeating itself here, surely ?
Here in the UK the lockdown seems to be slowly getting watered down. If this is reflected elsewhere and people are allowed to travel again perhaps they'll need the 747s back ?
A Farcebook group I'm in seems to be full of people who given the slightest chance will be off to Florida.