And of course that short after the start of this world, there won’t be the usual frequency of flights between airports, because the networks aren’t quite up to the level of older worlds yet to support all those flights with enough connecting passengers.
Old aircraft have one very distinct advantage, they are cheap to get. That means the waiting time to get the money for the next leasing deposit is way shorter and you can add way more planes in way less time. That effect early on can snowball quite quickly.