Comment by enugu
Funny reply. But consider that making twitter posts audible and experiencing the full rage is fundamentally different from starting with audio first.
The reason I say that is because I have frequently seen the same people who rage in text based media, have a very civil, even productive conversations on video (possibly because the human element is more obvious).
There is an open field out there for better functioning discussion sites, maybe audio/video micro-conversations could play a role (auto-transcribed as text is easier to skim and focus on chosen parts).
YouTube had video replies ages ago and it didn't take off.
The trouble with audio is the barrier of entry. By the time you've wrote your script and managed to record it and edit it you might as well have made a video.