I’m using nzb.life as my indexer and newsdemon as my provider. I very rarely have issues. SABnzbd Reports 99% success rate.
I’ve seen people recommend having a second backbone, even if it’s just for blocks rather than subscription, but I’ve never needed it.
Yup, music as well tv and movies. I do mostly get dance music though so maybe it’s not taken down as much as other genres.