Writers use the seventeenth birthday as a narrative countdown to high stakes (e.g., leaving for college, legal emancipation, or losing supernatural protections).
Content focused on this age group heavily leans into self-discovery, shifting friendships, and first-time adult failures.
Shows are increasingly bridging the gap between Young Adult (YA) and Adult content, reflecting the actual viewing habits of 17-year-olds who reject "childish" media.