>But looking more closely, Self-help had the steepest subcategory decline, with units down 26.3% year-over-year. Only two of 16 subcategories—crafts/hobbies/antiques/games and religion—grew at all (9.6% and 1.6%, respectively). The exceptions alone could make an interesting blog post for another time.

Self help being generally part of a larger grift pipeline for authors (for selling overpriced courses, seminars, retreats, infoproducts etc.), this is an actual positive silver lining for AI in society.