Radio Sitcoms

When the mp3s were not common,I even didn't have a walkman.The only thing I can hear everywhere,there is my mini radio.
I used to litsen to my mini radio to wait the "story time".
I called it "radio sitcoms".
Radio sitcoms are more vivid than book reading but gave people more imagenation than the television sitcoms.
But the biggest disadvantage is that radio sitcoms can't be translated.So the audiences group is not broad.Then radio sitcoms disppeared.
When the podcasts are popular, I even don't know if radio can alive for long time.
I still really hope that radio sitcoms can be revived some day.