I've dealt with the ogg container format a little and from what I saw it seemed quite reasonable, at least for the codecs it is typically used for, but for the

I've dealt with the ogg container format a little and from what I saw it seemed quite reasonable, at least for the codecs it is typically used for, but for the sake of argument I'll assume everything in that article is correct. In that case, ogg competes because it beats AAC on quality per unit size (low bitrate vorbis supposedly beats out low bitrate AAC at least, and I guess opus is supposed to be really good), and FLAC, which usually comes in its own container format but sometimes is distributed in an ogg, has smaller file sizes than ALAC. I don't think AAC had much traction before it became the iTunes Store format, and ALAC remains one of the least common codecs. Both of them would have lost out to vorbis and flac. Perhaps the reason they were chosen is because they have standardized DRM solutions (at least AAC).