... so flying (aquiring) new(er) acft is always cheaper? If you own an older aircraft outright, then it is in some cases more beneficial...
Depends on who operates the dinosaur, where in the world they operate - and where to/from and on what terms and conditions. Not all crews are paid Birdseed Airways salaries (Conditions)...
BA are finding it increasingly difficult to compete - their home base is now 'Open Season', rather than 'Open Skies'...
Bring on the changes, challenges and in the extreme, the cuts. Simply its change or dissapear...