If you’re wondering, no, Android does not track the sound dose for music played over Bluetooth speakers or headphones, as the actual sound level of these devices can be set independently of the Android device.

Apparently, it will not work for Bluetooth audio devices. With wired being used less overall. Makes this feature a bit redundant unless they add support for Bluetooth.

Or if, for the love of god, they give us back our headphone jacks.

Even with wired headphones, the volume setting didn't directly correspond to a decibel level. High quality headphones often have a higher impedance than cheaper ones, which makes them much quieter (unless you use an external amp). The automatic volume reducer thing was just always pretty frustrating in the past.