There’s a lot, and specifically a lot of machine learning talk and features in the 1.5 release of Opus - the free and open audio codec.
Audible and continuous (albeit jittery) talk on 90% packet loss is crazy.
Section WebRTC Integration → Samples has an example where you can test out the 90 % packet loss audio.
I wish they had a feed for posts like these. Their mail feed is mostly release notes but sometimes they post great articles like these and I would love to subscribe.