The release notes say, that after performing a media check, one should reboot to get a faster installation. In case this is true, either the media check should be fixed to not require a reboot or anaconda should suggest a reboot. In case a reboot does not make the installation faster on most systems, the release notes should be fixed. https://fedoraproject.org/wiki/Docs/Beats/Installer#Installation_media
That text has been removed. Thanks for pointing it out.