Qantas fleet metrics are as validated by the International Council of Clean Transportation poor.
Their fuel spend component of CASK is, self evidently a result of an extended delay in fleet re-equipment.
S&P made mention of it in February 2018
Roger Montgomery highlighted the increasing problem in July 2018.
Qantas has repeatedly stated through Little Napoleon they are waiting for the manufacturers to deliver something that can't yet be done. Presumably technology will as Little Napoleon alluded too several times, be a cornerstone to delivering the as yet unforeseen.
As the electrical problems with the 787 and indeed the powerplant issues of both GenX and Rolls Royce demonstrate, waiting for a comparative advantage to be delivered by a leap of technology, can expose the company to unforeseen risk.