*Im not sure of the costs, but the 744 is not a bad aircraft ( running costs aside, and as a short term fleet issue) , but to please the punters a refresh of Y class with a bit more room and a good reliable IFE system will keep them coming back.
And maybe some guys to keep the IFE system running properly. I don't think the local managers have realised yet that it takes a couple of extra guys on shift to work on the system fleetwide. IFE can be a labor intensive system.