For client facing positions, I've always felt it was important for J/F for int'l flights, especially to Asia.
Sometimes, the person whom one is meeting or negotiating with will often request an itinerary, and traveling in Y may be viewed by some in Asia as the person not being that important. There are times when some very important clients have insisted on arranging transportation and entertaining me for an entire duration of a trip, which, though I find exhausting, can't refuse. At the very least, I know they'd find it puzzling if I were to fly Y or stay in a cheap hotel.