Fictions could be cashed, but some websites would take technical measures to prevent them from being cashed, such as encrypted files, checking the cashing, limiting the size of the cashing, and so on. These technical measures can effectively prevent the buffer from protecting the rights of readers. There were also some novels that were read online instead of being cached, so they couldn't be cached. Reading online required direct access to the website, and the buffer could not provide such direct access.