It's always funny to me to see guys at airlines without a flow try to find reasons why a flow is a negative. Let's get this straight, there is ABSOLUTELY no disadvantage to a true flow. It doesn't restrict you in anyway. The only thing it does is GUARANTEE you a job! I'm sorry your airline doesn't have one, but saying that there are disadvantages to a flow, and that's a plus for a non-wo is just ridiculous.