Am I missing something why this option (subject) cannot be part of Global Settings? or May be it part of Global Settings and I am not aware of it.
My guess is that, this is a very Basic Setting that is going to apply to any plane I am going to fly. If I need to change it for a particular flight, I can then change at the specific flight’s ATC settings.
No, I am not looking for a aircraft.cfg file or livery change. Also ATC setting is temporary and is not persisted for all of my future flights.