it's up to the devs to make the final decision
Seems like it was already made with the comment that only 20 users seem interested in these features, so at this point it's just trying to sway positions. The way I see it, since we are swaying positions (or sharing thoughts), for a media center device there is no use case (at least for me) for disk encryption, mdraid, or lvm2. But I also just use a NAS with ZFS, and I use the built-in NFS client in Kodi to access the media and don't want to deal with trying to plug in 9 drives via a USB hub and then wonder why it's so slow moving a file. Basic works well.
In any case, not sure I agree with the argument that it stops with raid support. But it would be interesting if features were upvoted/downvoted to see what the community interest was.