Well, I'd say that it isn't really as "complicated" for the source media entity as it is COSTLY to change to a new codec, especially, in some cases, when the media company may have to pay the expenses for some of the affiliates/recipients. AFAIK, there is no shortage of transmission/relay/feed space among satellites for media company feeds and a fair amount of content (especially back feeds, not for Air content along with more and more for Air content) is sent/fed by Fiber. MPEG4 is doing just fine and MORE in regards to space (number of channels) per transponder and Fiber--for media company feeds.