Argument for Flying Southwest Airlines

I had a conversation today with a Southwest agent as I'm cancelling my SW credit card. Told her that the renewal fee was too high ($200+) and that with recent changes there was no difference IMO between them and the other carriers and she had great reasons to stay with them. First, all their Call Center agents are Americans and located in the states. Second, all of their airplanes are American made, Boeing 737s and that they were in a process to replace existing fleet with new and pointed out other carriers using foreign purchased planes. Anyway, we're going to...