I suspect no wind is more difficult than crosswind in a tailwheel on a hard surface. Crosswind you know which way it'll turn. Nil wind it's up to the pilot to initiate his own oscillation. And a variable wind suddenly resulting in a few knots tailwind will increase the distance travelled before it is taxiing.
A taildragger, (not tailwheel) I've never had on a hard runway, and never want to.