Over the years it's clocked up 20,519 flights for Cathay. That's a whopping 49,687 hours of flying time.
I am by no means an expert on such things, but both those numbers seemed low to me to get to the point where they scrap the airframe. Even taking into account that it flew a few years for Boeing, other commercial aircraft type were in service for much longer. And, it's not as if today's 777's are that much more fuel efficient than the original, are they? What's the determining factor in such a decision?