Congestion control seems pretty important for videoconferencing, especially given that these are mobile apps that are especially prone to signal degradation/tower switching that will drastically affect throughput. I'd argue that being able to fall back to reliable text chat when your network is imploding and video/audio is unusable is a core feature of web conferencing tools.
TIL! That definitely makes the use case a lot more dubious.
Doing some googling, I'm wondering whether the original intent was to switch everything over to SCTP: data channels seem to have used the same protocol as media pre-2014. Maybe no one got around to it and things ossified?
