There were many reasons why period films were not as good as before in online novels. The following were some possible reasons: 1. technological progress: along with the development of science and technology, the technology of film production is also constantly improving. Shooting and producing period films required more time and energy, but modern technology could provide more means such as special effects, virtual reality, etc. to enhance the visual effects and performance of the film. The application of these modern technologies might make the production of period films more sophisticated and improve the audience's experience. 2. The audience's needs: The audience in modern society has more diverse and personal needs for movies. They might prefer modern, sci-fi, or action-themed movies over traditional period films. In addition, modern audiences paid more attention to the plot, characters, special effects, and other aspects of the film, which might make some elements in the period film unable to be fully utilized. 3. Cultural differences: costume films are usually based on history or traditional culture. These cultural elements may have different meanings and expressions in different eras and cultural backgrounds. In modern society, people's understanding and acceptance of traditional culture are also constantly changing, which may make the cultural elements in the period films difficult to resonate with modern audiences. 4. Commercial competition: As the competition in the film market becomes more and more intense, film producers tend to pay more attention to commercial interests and box office revenue. In this case, the producers might pursue higher visual effects, more special effects, and a larger budget, which might reduce the quality and enjoyment of the film. In summary, the reason why period films were not as good as before could be due to many factors, including technological advancement, audience demand, cultural differences, and commercial competition. Different factors might have different effects on the quality and viewability of the film.