I didn't need to boycott #Spotify as I've never used it - nor any other #streaming #music service (not even online radio apps). They simply don't work correctly in my car - music app fights #navi announcements from #TomTom app (transitions are harsh and jarring compared to listening to normal radio or SD-card), sometimes the navi voice disappears, then when I leave the car music app randomly starts up on the phone at full loudspeaker volume (embarrasing if late at night).
Nothing I do fixes this - not updating #AndroidAuto nor even the firmware of the car #infotainment (a long and nerve-wracking job as you fear bricking the whole lot).
So any music I do listen to (when traffic conditions permit which isn't that often nowadays) must be on the SD-card..