As a code demo, awesome. However if you're old enough to remember the Nextel "walkie talkie" feature it's easy to see why quiet, asynchronous messaging is so a

As a code demo, awesome. However if you're old enough to remember the Nextel "walkie talkie" feature it's easy to see why quiet, asynchronous messaging is so appealing. Why do people keep trying to add voice back into the evolution of communication?