In short, HLS has powered p2p streaming via WebRTC since PeerTube v3 (3 years ago), and it has been introduced to get p2p video livestreaming (Webtorrent wasn't adapted to that usecase).
So, as @librecast, we still are using WebRTC for our lives (we just settled on one of the 2 ways we used to do it).
Could HLS be used on top of @librecast? If not then I'm not sure it's the way to go in the long term, even if going away from WebTorrent improves security.