I have a strong feeling that the growth at Spirit has a long, long way to go before we've reached any point where we can even consider slowing down.
The marketing department has come out already and stated they have some 500 untapped markets here in the US. 500 city pairs. Prolly gonna need more than the 140 or so airplanes we are projecting to have when this phase is over.
Look at RyanAir. They've got a market in Europe roughly the same size, both in population and in geography, as the US. They've got over 300 aircraft in their fleet.
I may be wrong, but I think we're just getting warmed up.