Code change:
1.1. The development of MOQT is driven by goals in a number of areas - <del> specifically latency, the robustness of QUIC, workflow efficiency and relay support. </del> <ins> specifically latency, the robust feature set of QUIC and relay support. </ins> 1.1.1. <del> HTTP Adaptive Streaming (HAS) has been successful at achieving scale although often at the cost of latency.  Latency is necessary to correct for variable network throughput.  Ideally live content is consumed at the same bitrate it is produced.  End-to-end latency would be fixed and only subject to encoding and transmission delays. Unfortunately, networks have variable throughput, primarily due to congestion.  Attempting to deliver content encoded at a higher bitrate than the network can support causes queuing along the path from producer to consumer.  The speed at which a protocol can detect and respond to queuing determines the overall latency.  TCP-based protocols are simple but are slow to detect congestion and suffer from head-of-line blocking.  Protocols utilizing UDP directly can avoid queuing, but the application is then responsible for the complexity of fragmentation, congestion control, retransmissions, receiver feedback, reassembly, and more.  One goal of MOQT is to achieve the best of both these worlds: leverage the features of QUIC to create a simple yet flexible low latency protocol that can rapidly detect and respond to congestion. </del> <ins> Latency is necessary to correct for variable network throughput. Ideally live content is consumed at the same bitrate it is produced. End-to-end latency would be fixed and only subject to encoding and transmission delays.  Unfortunately, networks have variable throughput, primarily due to congestion.  Attempting to deliver content encoded at a higher bitrate than the network can support causes queuing along the path from producer to consumer.  The speed at which a protocol can detect and respond to congestion determines the overall latency.  TCP-based protocols are simple but are slow to detect congestion and suffer from head-of-line blocking.  Protocols utilizing UDP directly can avoid queuing, but the application is then responsible for the complexity of fragmentation, congestion control, retransmissions, receiver feedback, reassembly, and more.  One goal of MOQT is to achieve the best of both these worlds: leverage the features of QUIC to create a simple yet flexible low latency protocol that can rapidly detect and respond to congestion. </ins> 1.1.2. The parallel nature of QUIC streams can provide improvements in the face of loss.  A goal of MOQT is to design a streaming protocol to leverage the transmission benefits afforded by parallel QUIC streams <del> as well exercising options for flexible loss recovery.  Applying QUIC to HAS via HTTP/3 has not yet yielded generalized improvements in throughput.  One reason for this is that sending segments down a single QUIC stream still allows head-of-line blocking to occur. </del> <ins> as well exercising options for flexible loss recovery. </ins> 1.1.3. <del> Internet delivered media today has protocols optimized for ingest and separate protocols optimized for distribution.  This protocol switch in the distribution chain necessitates intermediary origins which re- </del> <ins> Some live media architectures today have separate protocols for ingest and distribution, for example RTMP and HTTP based HLS or DASH. Switching protocols necessitates intermediary origins which re- </ins> package the media content.  While specialization can have its <del> benefits, there are gains in efficiency to be had in not having to re-package content.  A goal of MOQT is to develop a single protocol </del> <ins> benefits, there are efficiency gains to be had in not having to re- package content.  A goal of MOQT is to develop a single protocol </ins> which can be used for transmission from contribution to distribution. A related goal is the ability to support existing encoding and packaging schemas, both for backwards compatibility and for

Related discussion:
text: One small normative change: I relaxed a SHOULD to a MAY when discussing relays writing data out of order. No one is implementing this right now.
Here are some editorial notes on the document Line 72. “MOQT is a generic protocol is designed to work” Line 91-93. “The development of MOQT is driven by goals in a number of areas - specifically latency, the robustness of QUIC, workflow efficiency and relay support.” This sentence is intriguing. What does the robustness of QUIC mean? Latency, workflow efficiency, relay support are not “areas” or maybe area should be defined. (side note on the missing Oxford comma in this sentence) The Section 1.1.1. Latency as a whole is very confusing. HTTP-based streaming is not designed for low latency mostly due to the essential request-response paradigm. Queuing on the path has a insignificant impact on the end-to-end latency for HAS. The “speed at which a protocol can detect queuing” is not related to the relatively high latency issues of HAS. Overall, I see a mix of unrelated subjects here, which makes the paragraph overall meaningless. I would recommend starting the paragraph with a topic sentence (which may be the last one of the current paragraph). Line 120. “Applying QUIC to HAS …” (and the following sentences) is not necessary. The reasons for which QUIC does not bring advantages to HAS are still debatable on many points. This QUIC-on-HAS remark could raise unnecessary questions although the beginning of Section 1.1.2 is clear and sufficient to convey the message. Line 125. “Universal” has a too broad sense. Do you mean “Unicity of protocol in the whole pipeline” (or something like this)? Line 127. “Internet delivered media today has protocols optimized for ingest…” I don’t understand this sentence. Line 127. Some examples of protocols could be good to support these claims. Note that WHIP is an attempt to unify the protocol. Line 146. “to treat relays as first-class citizens of the protocol” is an excellent marketing message but it does not mean anything in a technical norm. Furthermore, see my two reserves above. I’d claim that the current draft is not making relay first-class, on the contrary.