Problem is, plenty of other formats have had support, but never been able to get over that hump since the quality of 192 kbps mp3s are fine to most, and for most even less works. In addition, you have a lot of companies that keep fighting for their own choice of formats to go through since they each want their choice to succeed, most notably with portable music players. To even take this Apple format for an example, you have it supported on iPods, but what about other portable music players? Or ogg? These formats don't enjoy ubiquitous support, and probably never will because of the thorny issue of licensing issues that could arise if one companies' technology wins out over the currently fairly neutral mp3.