Shareholder, the 767ER service to Hawaii is the exception. And those are the flights that I travel on (YYZ-HNL). However, AC operates flights to OGG (and to HNL) from YVR on domestic 767s. These are horribly uncomfortable for such a long flight. So I've eliminated that as an option.
I've been looking for alternatives to AC's YYZ-HNL service on other carriers. I'd be happy to travel on connecting flights (AA/UA?) to avoid this flight. However, the other carriers appear to service this route with domestic 1st class configurations. Since comfort is my priority, I'm stuck with AC3127/3128.
My remark about the domestic service to Hawaii is in reference to all carriers.