I respect the idea, but in practice I find that Apple Music sometimes plays tracks from the same album at noticeably different volumes. It's possible (even probable, I guess) that whoever is sending Apple the digital masters messed up, but frankly when I'm listening to an album front-to-back that's one situation where I basically need the perceived volume level to not be messed with.

Weirdly enough, I've noticed this happens with and without the sound normalization feature enabled.