I believe it's all down to dress sense and standards. Is it true to and fair to say that all FR pax buy their clothes from Primark? We live in a world of choice and I also believe you get what you pay for. In those days choices for clothes and were limited and probably made in the cotton mills of Lancs. Now you can buy £10 jeans which can hang from your a''e. I remember when I used to buy Levis for a fortune, but they looked good, but wearing them on a long haul flight was sheer hell, because they were too tight and uncomfortable!
Maybe we should take a leaf out of the Arab dress sense, especially Saudis. Wear thobes which keep you comfortable and cool in the heat and warm in the cold. Oh yes and they are cheap to buy! (awaits for Primark to open in Jeddah)