Isekai anime is perpetually chasing behind light novels and, to a lesser extent, manga. For instance, anime only started to embrace villainess isekai stories around 2020, lagging years behind the movement's light novel peak. Due to the theme's overwhelming popularity, studios have hundreds of tales they can adapt, eliminating the need to craft original stories to try and take a piece of that otherworldly pie. Still, considering the concept's inescapable nature over the last decade, there should be way more original isekai anime.