I have a basic framework for how each of the three major US airlines operates today. The variance between them is shrinking, as Delta is the best-run overall of the three and the most admired. Both United and American executives have spoken glowingly of their rival, and clearly want to be more like them.
This framework is useful to me as I see news about an airline. Every item gets processed alongside a context for who the airline is, what’s in its DNA. That news either comports with my pre-existing model, or conflicts and requires updating the model.