For example, you need to root and patch your Bluetooth stack on your phone if you want to use all of your AirPods features on Android, and not because Android is doing something wrong, it's because the Android Bluetooth stack actually sticks to the spec and AirPods don't.
And even when you do that, you can't do native AAC streaming like you can with iOS/macOS. Even if you're listening to AAC encoded audio, it'll be transcoded again as 256kbps AAC over Bluetooth.
Even no name earbuds on Amazon manage to not break Bluetooth and can offer cross platform high quality audio over Bluetooth.