In times like natural disaster, you might not be able to use fancy apps like that, which require the network. FM Radio is a basic no-frills means of communication, and you're telling me that I don't need it? B!tch, please.
Also, my S2 currently has Stereo FM. If somebody tells me to tune in to some station, I don't want to not be able to, just because I upgraded my priceless S2 to some bulky piece of !@#$ that doesn't even have a Radio!
Apparently you feel very strong about the radio. I also have the S2 and can honestly say that I cannot remember when last I used the FM radio, I rather use the app. Luckily we have not had any natural disasters here where I live.