For those of you keeping score, late last year American Airlines’ parent AMR declared bankruptcy. The Chapter 11 filing of the once largest airline in the world brought to a conclusion the era of disintegration for the legacy commercial airline market. You can argue about the principal cause for the airline industry’s demise, but ultimately it came down to the fact that the market leaders in the industry refused to adapt to the changes going on around it while others embraced it and found creative ways to rise to the top.