They disappear with Vorbis. Vorbis provides a mechanism to do this. This makes Vorbis well suited to production work in ways that MP3 never was. Developers and users, will appreciate having a high-quality set of reference libraries. This means that not everyone who wants to write an audio player needs to write their own decoder.
Developers also have more time to spend on other things besides audio formats.
This allows them to build more sophisticated and useful software. It was limited to one bitrate, but it already had plug-ins for most players as well as support on many platforms. In August, Ogg Vorbis beta2 release was launched at LinuxWorld Expo in San Jose, California. Five bitrates from 128kbps to 350KBps and several quality improvements were the main features. Right now we're rapidly approaching the beta3 release, which has a number of significant quality improvements.