I agree. You can create a much better user experience for a certain way of performing a task by using a dedicated device, but that doesn't mean that overall us

I agree. You can create a much better user experience for a certain way of performing a task by using a dedicated device, but that doesn't mean that overall user experience of achieving your goal is better. Separating features to different devices doesn't seem a very good idea. For example, if I can't reach a person by calling, I want easily to pivot and reach him through different, possibly asynchronous communication channel (email, sms).