If this reply was to me thank you. I checked in at T-24, no upgrades available. Checked the flight, it is sold out save for a couple seats. Literally changed in an hour so im suspecting AC cancelled another half full flight and bumped everyone onto one plane. Id checked the status of seats just an hour prior to this so was a tad shocked.
there are just a couple seats in Y and 2 left J. Id love to upgrade hubby who is currently working night shift so little sleep before flight but have been told AC will not upgrade just 1/4.
never upgraded before, or tried to, had a go, didn’t pan out for me, theres always a next time

reading threads on here it seems sometimes it works sometimes it does not.