In the next web, https://web.dev/webtransport/ https://web.dev/webtransport/ would be the thing to move to. It's a bit nicer under the hood than websockets, tho

In the next web, https://web.dev/webtransport/ https://web.dev/webtransport/ would be the thing to move to. It's a bit nicer under the hood than websockets, though it's also brand new. My comment was less about a full duplex replacement though, and more "how to get something equivalent to trailers, that works in browsers today", and this would enable that.