Obviously, wide body domestic flights would continue to offer J, as would primary trunk routes like YYZ-YYC/YEG/YVR/YWG/YHZ. And non-stops between YOW/YUL/YWG-YVR/YYC/YEG/YHZ. Beyond that, we have already seen removal of J from most of the 737 fleet, and as AE146s get replaced the CRJs. This means JETZ will not have J service. As with AC's own CRJ flights.

I also think there is enough of a point-to-point and connecting customer base to justify J on the Eastern Shuttle between YYZ-YOW/YUL as well as between YYC/YEG-YVR. [Also, since these shuttles are not normally dedicated aircraft as found on most shuttle services -- at least the Eastern one -- the use of a variety of mainline aircraft dictates availability of two-cabin service.]