While Fedora developers continue discussing the possibility of making their release cycles longer, the latest post-F25 topic is the official state for the optical Fedora images. In particular, Fedora QA wondering about future requirements given the significant time requirements spent on testing Fedora CD/DVD images.
Two ideas being considered are making optical media issues not block alpha/beta releases while a secondary idea is to not make optical media issues block the final release for certain flavors/images. The idea at this point isn't to do away with CD/DVD installation support, but rather what QA should be testing again and when should problems block the release.
The discussion is ongoing with no firm outcome yet. Those wanting to see the current discussion can see this Fedora devel thread.
When is the last time you installed a Linux distribution using a CD/DVD? I haven't done so in probably a year or more with nearly all Linux distributions producing working hybrid ISOs and even BSDs these days are working nicely with USB images.