- playlist decayed and dropped songs, YouTube is even worse about this
- Play Music had a new releases browser highlighting new album releases by genre, you could "walk" into them in AA, then they bled that off
- as it stands "Play" doesnt have music anymore, and so the only discovery is YouTube's recommendations
- YouTube's recommendations are somehow difficult to control, overly gamed, repetitive, coarse, and generic -- some of which are contradictory. Google wasn't even able to protect Gboard from exploits like this with their unsated thirst for big data automation dominance
- they haven't begun to cooperate with other vendors to operate with assistant, instead picking winners, again
- for a span battery was concerning, it's not right now
- for a span Google's failed record of protecting user privacy, even now Google+ echo's when the Photos flow Share workflow walks me into privacy violating features
- i have qualms about providing an ad personalization business real-time granular data about my mood (though it's unlikely since my tastes are too obscure, anyway)
- i have qualms about subjecting myself to the opinions of a business with large enough reach to be an effective political entity and lever of corporate activism against my neighbors in society (particularly for an inferior product)
Hope this helps.
Edit: also the playback history was pretty bad IIRC, I assume it lumps audio playback with shorts, and shorts can't be organized into playlist despite their efforts. I need music to be a commodity, not a gift/promise.