But airlines aren't suddenly cancelling flights. They're looking at their schedule and consolidating whatever they can. And charging more for the remaining seats.
And the value of the aircraft they already own just went up.
I've also seen some airlines downgauge turbojets to Q400s, which is slower but saves a ton on fuel.
Routes that needed to run X times per day to be competitive (because people want flexibility in departure and return times) can now be consolidated into X minus Y flights with the same number of passengers.
It's 2019, airlines have automated processes to rebook when a flight is cancelled.
And upstart airlines trying to build their fleets couldn't.
And automated rebooking is a fantasy. Sure, the airline will try to default you onto some other connection, but I've always ended up talking to a human afterwards and picking out a better alternative.