For instance, with Glass - there are 171 albums on Idagio. And it breaks them down with works, instrumentation, ensembles, soloists, genres (piano solo, chamber, secular vocal. etc.), conductors, and recording date.
If you want to compare the 22 piano solo albums that Jeroen van Veen has recorded of Glass's music - easy to pull all of them up quickly.
Their encoding is also vastly superior to Spotify or (yikes) YouTube Music. If you have a decent signal-chain for listening, high-quality components, and enjoy Classical... Idagio is head-and-shoulders above the rest.
I gave up on Spotify when they removed the widget functionality on Android. I know they returned it eventually, but not without complete uproar. It burned myself as a decade old (family) premium user though; I used to love them, but that complete disregard completely changed that.
Now, only a 3 month minimum (6 would help) completely free retrial would get me back. Thus far, none has been received.
(On the flip side I absolutely love YouTube Red or Premium or whatever they call it these days.)
The UI is the worst I've seen on any music service or player, but I'd found quite a bit of music I like through their recommendations.
I used to pay for Google Music and transitioned to YouTube Music but eventually gave up because it has so many issues. I also tried Spotify but didn't like it much so now I don't know what I will use.
The implementation and mixing music videos with other video content in my Youtube account is horrible on the other way.
Youtube Music implementation of Chromecast is spotless while Spotify every so often interupts with "Your spotify account is used on another device" (Not true just checking my phone). In general Youtube is also tolerant of using two devices with the same account for a few moments.
And no podcasts in the music app... Hurah...
I recognize this isn't mainstream listening, and for all I know the ratios are reversed for more popular music.
I found the Pandora choices of songs annoying. I love Philip Glass; I don't want to listen to a bunch of other people playing triplets against eighths. It's derivative and boring in comparison. I do want to listen to his contemporaries that compose in different ways. Or let's take Nuut again. I came across her recently while surveying contemporary Estonian composers. Pandora doesn't let me do that so far as I can tell. I'm interested in what is going on there compositionally over the last 2 decades, I am not looking for another person that writes something that is very 'similar" (according to the Pandora algorithms).
Finally, I never use shuffle. So much of what i listen to are
I understand my use case is not the only one, but neither is yours! People select different apps because they provide what the person wants.