Same threads on AA and DL as well.
Bottom line is that all three (as well as other US carriers) are well aware that the US won't let them go under. If COVID issues point to insolvency, there will be a bailout. That may take many forms, including a "tax holiday" but there will be whatever it takes,
Problem is that the core business are corporate customers who are being directed not to travel. Offering an extra hot towel or whatever won't change that,