"Nobody noticed"? The so-called "death" of MP3 has been all over the tech media, complete with catchy-but-misleading headline.
The patents have expired? Do Fraunhofer even have the *option* of "renewing" them anyway? If not, it's hardly surprising they chose not to continue their licensing programme; hardly constitutes the "death" of MP3.
Of course, MP3's popularity and cultural importance has been in decline for several years with the rise of streaming, but that's nothing to do with this misleading story.