Strange, certainly don't hear of baggage left behind happening at all on YYZ-YQR, a route that operated with the CR7's, and is a similar distance to YYT-YYZ.

And inbound to YYZ, there should be plenty of alternates closeby (unlike YQR where the alternates are somewhat limited in comparison -- YXE, MOT, YMJ), so as to not necessitate the uptake of significant extra fuel for diversion purposes.