There are new forms of radio - DAB, for example - which offer multiple benefits over FM, and still don't require data.
An FM receiver still needs power!
And it matters because the longer we cling onto dying technology, the longer it takes to get a newer, better standard. Think about VHS. I don't know about the US, but in the UK we have now turned off analogue TV signals, and I think the only thing stopping us turning off analogue radio signals are car stereos.
There is a very good reason to keep FM or similar standards around, in the event of emergency you can broadcast information out without requiring the device receiving to talk back.