Originally Posted by Denguin

d) The only issue with having a dedicated pre-clearance terminal for US departures, is that lounges located in the true "international" terminal are not accessible, and neither are the domestic lounges. AFAIK, there are only two lounges in the US terminal, a closed Plaza Premium lounge you can access via top-tier AMEX cards (that has no estimated date of re-opening, and is shite anyways...) and an AC Maple Leaf Lounge.