We were putting us with this cr@p in the 70s. It did not only apply to aircraft on the end of a 14 hr leg but legs like Wollongong to Sydney and hold at Bindook for twice as long as the flight.
Brisbane was just as bad.
TWB to BN get to 20DME and get hit with unplanned 30 holding. One pilot replied that that would use his 15% and some of his FR. ATC reply was "cancel hold, track direct"