The anime-only arcs in Boruto provide additional opportunities for character development for Boruto and other characters in the series. These arcs often focus on exploring different aspects of Boruto's personality, relationships, and growth. They allow viewers to see Boruto facing unique challenges, making tough decisions, and learning important life lessons that shape his character throughout the series. Additionally, these arcs give more depth to supporting characters and provide insights into their motivations, backgrounds, and connections with Boruto, thus enriching the overall narrative and character dynamics in the series.