[al_ak]

It'd be great if there was a music service that somehow incorporated the metadata in something like the Allmusic database. Say for example, while listening to an album, you could click on any side member and easily access any other album they'd played on. Same with songwriters, or album producers, recording engineers, etc. You can get all or most of this manually, but tied into a listening interface would be pretty slick.

That said, I don't know how much of a market there'd be for this

[chipotle_coyote]

There is, sort of; it's called Roon, and IIRC its interface can do exactly what you're describing. Back when I was a subscriber, its equivalent of a "daily discovery" list would frequently come up with things like "Highlighted Performer: Drums McDrumface" and create a playlist of every song in my library McDrumface played drums on.

https://roonlabs.com

The downside with Roon is that it's not actually a standalone music service; it's sort of like a software-only version of Sonos or Bluesound, letting you aggregate your personal library and (extremely) select streaming services and send sound to any Roon client device (a computer or mobile device running Roon software or, in some cases, directly to hardware that supports Roon's transport protocol). And, it's still a subscription service -- so you're paying $10/month for great metadata, that multidevice playback system, and an "audiophile" music player. I subscribed for a couple years, but decided I really couldn't justify it.