Well, I think you've been spoilt too. A B757 or 747-400 is long in the tooth but a B777LR?
Hehe- I take your point, Harry- but the LRs have always done big hours, and are among the older members of the fleet. We are shortly going to start retiring the early ERs- there seems to be no such renewal plans for the LRs, while we keep finding new things to do with them.