Yeah I've adding npub tagging to some of my stuff and it's really cool way to let artists know you listened to there stuff. Sadly I don't think most artists know they are even getting messages which is sad.
On the new releases thing in the PC 2.0 side of things it's a mess. HeyCitizen (npub109p…5aaj) just drops his singles in one feed so if you subscribe to that feed you get a notification of a new track like you would for a new podcast episode and it works well but then everything has to be in one feed and that's not great either.
Ideally I think publisher feeds would fix this but it's not very well supported either. Say you Matt put all of your stuff in a publisher feed and I subscribe to that and get notified when you release something new. That's atleast how I envision it working but we're not there yet on the PC 2.0 side of things.
Nostr music ties everything to one npub and that could work but what about things like NMNU or Hashpower that have several artists under them. I guess you could set it up so that they could tie it to the artists npub and not theirs but then what about signing stuff and they also don't own that stuff then since it's being signed by there labels keys.
For those of use that keep a close eye on this stuff we check the search tab on LNBeats to see what's coming in new but that's still a manual process but sometimes that's not a bad thing b/c you can't always trust automated systems.
Take my music app stablekraft.app for example. I check publisher feeds nightly for new additions and I could let users know that an artist they favorited in the app released something new but that more stuff to add to my app that I'm trying to keep lightweight since it's a PWA.
