lots of people using Usenet.
I have 2 main servers on 2 different networks, plus some block accounts as backup and a couple of indexers.
But for music, especially if its anything unusual, rare, or otherwise difficult to locate elsewhere, get onto soulseek. I use N+ personally and have uploaded ~80TB this year so far and downloaded about 600Gb. I dont do torrents very often so SLSK is how I give back to the community.
Soulseek is an old school free file sharing P2P platform, like limewire, kazaa, winmx, ed2k etc. just like the good old days.