But if the cabin crew are dressed the same-uniformly-then they can be identified whether they are in a full blown formal outfit or casual dress. The casual dress may not be appropriate for first class on a legacy carrier but for many lo-co and maybe charter flights it could be a practical alternative. As for the flight deck, it may be an anathema but I can think of much more comfortable options than the bog standard white shirt and tie while still retaining a smart outlook and the all important corporate identity.