If it becomes a statistical norm, it will no longer be crossdressing technically. It will be just normal dressing. Like women wearing trousers. Used to be Man's wear, now it is not. Dresses, skirts and makeup would not be women's (only) wear, and therefore one would not be wearing the garb of another gender.
So, from a mathematical standpoint, by definition, impossible for crossdressing to be a norm.
