[lukeh]

There are economy of scale advantages to using standard protocols and hardware: the R&D is paid for by the computer industry, which is much larger than the audio industry. Many NICs have support for PTP hardware clocks and hardware time stamping, and (unlike AVB/TSN) AES67 will work with most network switches. It's also possible to implement software endpoints by pointing an RTP client at the AES67 peer (albeit, this won't be a true AES67 endpoint as it won't play out synchronously without a PTP synchronised media clock).