How does using a frame bag work with a stiff cross wind?
Based on personal experience touring in windy southern Patagonia, the effects of using a frame bag in strong cross winds is not much different than other carrying systems. Think of it terms of surface area, with panniers or any other kind of bags you have surface area at the ends of the bike which can affect handling when hit by a gust. With a frame bag you’ll get the same pull, but it will be centered and not affect handling of the bike.