(1) Hold an auction. If the only person who turns up is a homeless bum with a dollar then the aircraft now costs a dollar and we have a homeless industrialist on our hands.
Ditto (4) for the software; it doesn't get deleted because the ownership changes.
(2) A sibling comment to yours suggested exactly that. We aren't protecting the business (nobody wants to fly at the moment, that is why they are about to go broke). So we can't be protecting consumers; the capital itself can't catch COVID-19 so isn't under much threat so logically a bailout is either protecting shareholders or workers.
And my position, radical as the free marketer that I am, is we should protect the workers during the process, but sack the shareholders and provide crisis support to the vulnerable insofar as they used to be shareholders.
(3) Yeah; but bailing out the airlines doesn't actually help that when you inspect it. Nobody is using the airlines; they need to be mothballed ASAP and maintained on a skeleton crew for 6 months.
A bailout of the airlines under these conditions isn't the worst idea; the bank bailouts in '08 were substantially worse because they went to the people who caused the crisis. But it is much more dangerous than it seems making decisions in a crisis, from outside the company, saying 'it can't possibly be their fault; lets give hem a boost!'. The view from the outside might be misleading and we might be rewarding reckless behavior. We have this company concept precisely because it contains the damage to a sacrificial legal entity that we can kill off.