R
Apart from outrageously high costs, the problem in Oz for Heavy jets is the appalling lack of infrastructure.
For those of us that fly around the world, we consider 24R @ LAX ,the outer pairs at CDG shortish as is 4R at the notoriously underfunded JFK . 16L in SYD and 27 in MEL are both 1000' shorter than those.
While technically legal/possible, these cheapo 45m postage stamps are inferior, from an airmanship point of view, to 90% of runways most long haul pilots land on.
Don't worry though - you can buy unlimited grog in the shopping mall that blocks access to immigration.
As we said back in the 70s: Wake up Ostraya.