From a personal point of view i won't lose any sleep if planes ain't pumping out and dumping fuel on us. We need to cut down on pointless flights/ air travel, now is a good time to change habits.
No different to any other business that is either fucked or has been fucked by an ever changing world. One door closes another one opens. The flights business is a very competitive industry, many companies just can't compete or make money. They would have gone under sooner or later anyway, same for many other niche or needless set ups.
People leading ridiculous and unsustainable lifestyles that are often way beyond their means will get the biggest wake up call after this. Perhaps in the long term society and the environment will be the biggest benefactors from the fall out of this virus.