We are the Microsoft web media team, and we need Insertable Streams/MediaStreamTrackProcessor to be enabled and supported on Safari, so that we can have access to incoming raw media and do further processing on the media to enrich the user experience.
<rdar://problem/94281395>
The Zoom web client uses MediaStreamTrackProcessor to efficiently transfer video frames to be encoded, so this API would be very useful to us.
Agora.io web team uses this API to process audio/video streams on Chrome and Edge. Media processing on Safari is extremely ugly w/ this feature, everything need a workaround.