VP8 and H.264 codecs are mandatory to implement to be webrtc compliant. Simulcast is a way to use multiple encoders at a time to provide different resolutions of the same media to chose from as a way to adapt to bandwidth fluctuations (and other good things). Unfortunately, while some patches were proposed some two years ago by some including HighFive, libwebrtc did not implement support for simulcast with the H.264 codec. H.264 was then a de-facto secondary codec, and Safari which only supported H.264, could not achieve the same level of adaptation (or quality) than VP8 and some other browsers could. This blog gives more details about the epic journey to get that done, the design of the implementation, and the impact for WebRTC products.
Such is the title of one of the latest blog post by wowza. While it is a very interesting question, I believe the blog post is conveying the cliche the streaming ecosystem as been carrying about WebRTC and that are not longer true. I do not believe wowza to be knowingly deceiving people, i see their point, I just believe that recent advances in the webrtc protocols make most of their statements inaccurate. This post is an attempt to document the statements that can be proven wrong today. Fact-checking in some way.