[dghlsakjg]

It doesn't pop up on its own, but it is the default response to a lot of actions.

Accidentally press the play button? Apple Music. Charge your iphone through your computer? Apple Music.

I find it pretty annoying, but it is also easy to eliminate the default behavior

[superb_dev]

I've never had Apple Music open when I plugged in my iPhone

[chongli]

I leave Music running all the time. I have all the store and subscription features turned off. I just have the program loaded with all of my MP3s, something I've been doing since it was called SoundJam MP [1]. I have all my playlists in there and it works fine with the play/pause/prev/next buttons on the keyboard. I think they bug me about subscribing to Apple Music once every major OS update. I promptly say no and turn off any of the extra features they added.

[1] https://en.wikipedia.org/wiki/SoundJam_MP