Well, that's a rather pie-in-the-sky fiction (requiring total cooperation from everybody at once, btw), given that IP-based solutions have already eaten the wor

Well, that's a rather pie-in-the-sky fiction (requiring total cooperation from everybody at once, btw), given that IP-based solutions have already eaten the world. Also, a broadcast radio network is useful outside of emergencies as well. (Not to mention that you're still assuming mobile coverage)