The history of the Qantas A380 has been a disaster, outclassed very quickly in cost of operation by the 747-8I and has had more engineering issues than any Boeing aircraft I can recall……...
…….but remains enormously popular with passengers; particularly Premium passengers. I would suggest that "disaster" is ever-so-slightly overplaying the case. If the 748I is so wonderful, is there a reason why there are very few 748-I's in use as passenger aircraft relative to the number of A380's?
Either way, both are now difficult to justify against modern long-range twins (except as a freighter which, it seems, is where the 748I is well suited).