B-HUJ was the last passenger 744 to be delivered to Cathay in May 1995.
The 747-400 is no longer very cheap to operate, compared to what is available on the market. Now that the A340-600 is out, I think Cathay will be concentrating on that aircraft, and eventually have fleet comonality on the A340s and 777s, and not have the 747 as a third aircraft group.
A Pacific Plotting Chart we have gives a bit of an insight into the difference between the A340-300 and the 744s in fuel burn. Obviously, the 747 is bigger, so some difference is expected. The chart shows circles drawn around some of our diversion airports and the approximate fuel needed to get there. For example, the 1500nm circle around Honolulu shows the 744 needs 47.5tonnes of fuel and the A340 needs 32.4tonnes of fuel. As you can see, there is quite a difference, and over a 15 hour flight, there is an appreciable difference in fuel burn (Read money burn). The new 747-400LRs are not going to be much more fuel efficient and I just can't see Cathay buying them at all.