I knew a left-handed math prof who had had that treatment growing up in Holland. But he'd developed a party trick.
One day he told us about this. And said that the result was that he could write with both hands. Different things. He demonstrated. Wrote with both hands at once, different things, on 2 neighboring boards. Kept on writing. Got to the bottom of the boards. Then turned around, began lecturing from the first board, reached the bottom, and continued the lecture from the second. He had laid out the boards perfectly to do this.
One day he told us about this. And said that the result was that he could write with both hands. Different things. He demonstrated. Wrote with both hands at once, different things, on 2 neighboring boards. Kept on writing. Got to the bottom of the boards. Then turned around, began lecturing from the first board, reached the bottom, and continued the lecture from the second. He had laid out the boards perfectly to do this.
It was a very impressive party trick.