For audio the jack is a perfect interface. Extreme bandwidth, very easy to connect. That's why it is far from obsolete. For listening to music this is great. A

For audio the jack is a perfect interface. Extreme bandwidth, very easy to connect. That's why it is far from obsolete. For listening to music this is great. A lot of very good headphones to choose from and very good audio quality. But when you want to include a microphone, volume control and other features it becomes a problem. Hacks with different jack types were introduced but they are all hacks. So I understand why Bluetooth is better for different types of communication. What a lot of people don't understand is why Apple removed the jack while Bluetooth was already there. Apple did not introduce something better but removed a feature. Some brands are listening to customers. They started including the jack again. Having a jack and Bluetooth is great because you can choose what to use: great sound and a broad choice of good headphones or Bluetooth headphones with a lot of integrated features.