If you want to take on archiving a huge library of media, more power to you. But that isn’t a requirement. Many people use streaming downloads so that local storage is basically not required. Others download and set up services/plugins to delete episodes after they have been watched to ease storage requirements. Even if you want to keep all media, Raid is certainly a luxury, not necessity. Losing all of the media from a drive just means needing to download it all again.

And all of this is completely out of the argument of “feature parity” with Netflix. They drop shows and movies from their services all the time.