Which is weird in case of Apple Music because Apple knows exactly if I am sleeping, running or driving a car - just from reading my watch.
You say that, but I attended a conference with Spotify- they are specifically working on that problem now.
Time of day aware recommendations is something YouTube seems to have had for years. It always knows what to give me up top based on if I'm sitting down for dinner or lunch or if I'm looking for an audiobook for bed etc
Why isn't late evening before sleep good for heavy metal? I listen to the same music I listen to all day before sleep if I had music on.
The music I listen too doesn't change no matter where I am or the time of the day.
1) aren't doing the sensor fusion we all think they are, out of inability to access the data.
2) the models (and therefore modelers) aren't good enough to use the data they have correctly.