The main thing I've always wanted from the airlines with respect to this exact topic is an understanding of their decision process and guidelines. I think we'd all agree that WN's ability to hold a flight 12 minutes for this particular passenger is a positive thing, but I would indeed like to know the standard operating procedure for holding flights for regular everyday connecting passengers.

There obviously *is* a line drawn somewhere, on all airlines, and having at least some visibility into the "norms" for that airline would probably reduce stress on the part of passengers who perceive their own situation as being treated unfairly. (e.g., "We always wait for other people, but they didn't wait for me!")