I think UA, AS, ans WN have the right idea. They're not doing any mass fleet retirements. It's better to keep airplanes and layoff pilots temporarily. It's far easier to bring those two things back quickly when the recovery hits. DL will be out of luck. DL will have no planes and their pilots will be furloughed far longer because of that decision to permanently remove fleets. UA, AS, and WN can just pull aircraft from storage. DL won't have that option.