Almost a Thousand Hours and No Airforce?

[whyidie]

Feels like airForce is much more universal, while art is "just to survive" thing at that point?

I think it generally matters from the map, if you'll have to "swim" to other leading civ i would be very greedy to build art. Oil availability could be another factor.

Oh yes, nothing worse than beelining to planes only to discover you have no oil.