The vast majority of my *A flights are AC so no need to accumulate on another program to get benefits of an airline I don't fly often. TG comes second and I've thought about joining that but it doesn't really make sense for me. My wife and I do a good job of burning our AE points. Still able to IKK her to HKG if we plan more than 7 days out.

Grandma who lives in YEG but likes to visit often has also gotten very used to domestic J.