Flew Air Canada SYD - YVR a few weeks ago (early March, 2023). Booked in Premium Economy (was waitlisted for Business which cleared at the gate) as an a E50K (Star gold) I had 'Prio. Security' printed on my boarding pass and was specifically directed to use the Priority Lane by the check-in agent...

It would get messy with non-alliance agreements as well. Think about Air NZ and United... would Air NZ be at the Qantas terminal (for connecting domestic AU flights) and would United would be at the Virgin Australia terminal (for connecting domestic AU flights? If so, this would result in a trave...