You can play Spotify while playing GT7. You just need to turn off BMG in the game. Music replays and the new Music Rally won't work obviously...
My question is will they create a track list in GT7 that can be modified? Like, can I turn some of these songs off? Some of the tracks are just downright ridiculous! Beautiful in their own right but man... I don't want to feel like I'm at a fairground in 1972. I want to feel like I'm about to jump behind the wheel of one of the world's most exotic and fastest cars.