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I did some research. If you stand a tire between your legs the left and right sides of the tire are the same regardless of a directional tread. The metal wheel on which the tire is mounted is not symmetrical: the inside and outsides differ. So if you have a tire with a directional tread on it then if you leave the tire on that wheel you are indeed constrained not to just move it over to the other side of the car (back or front) if you want to preserve correct direction of tread. But if you take all the tires off the wheels and swap tires side to side back and front you can rotate both back and front tires side to side separately front and back while preserving correct tread direction. In my case I do not have to even pay any extra for removal of tires from wheels because my practice is to have a single set of wheels and to swap summer and winter tires with the seasons. I drive the sort of distances that require no more rotations than is afforded as an opportunity with my seasonal tire changes. So I would not need to be concerned if buying an ID.4 or Audi q4 e-tron, etc.