I wouldn't say demonoid is dead. I would just imagine that some of the older torrents might be less active because all the long term members who had interest in those torrents got them a long time ago. The fresh torrents that are good music are still highly active. Plus i love all the rare bootlegs and 96khz 24bit vinyl rips available.
For example, The fact that you can get stuff like 83 cds worth of The Beatles Abbey Road sessions from the purple chick collection in FLAC is amazing.
But that being said, if someone wants to throw me an invite to one of these supposedly better torrent sites for music, I wouldn't be opposed to checking them out