Offish topic
Compare to NZ where your passport goes direct into the gate machine.
Not the Au system where your passport is scanned in the koisk, that gives you a card to put into the next gate machine. {Cards to landfill or reused?]
NZ is going towards to electronic arrival cards. Started a few days ago at CHC. Other airports over time.
The free airport operated T bus is the "transfer bus" running on the public roads landside.
QF operate their own free bus from T1<--->T3 airside
And the (expensive) NSW govt train, part of the metro train system