Many American pilots retired early to take advantage of a contracting quirk that enabled them to turn back the clock as they collected their retirement payout.
The advance notice doesn't apply post 60 so they've created a situation where they won't be able to figure out when a 60+ pilot will retire.
What the article doesn't say is that those pilots did indeed give notice on that Oct 31 date! The "quirk" allows them to withdraw their notice at the end of 3 months if they change their mind. Apparently they did NOT change their mind!
Management had adequate notice. It IS their fault if they have to cancel flights!