I can tell you that it still works in chrome, this method was used by one of my coworkers as a quick and dirty hack until we had time to implement a real solution for data streaming. It worked fine in all major browsers ~2 weeks ago.

I’m not sure what context you were using it in? It still works for non-HTML content types, can be used for mjpeg video streams, etc but you shouldn’t be able to use it to replace the previously rendered HTML contents of a frame.

Hmm I don't remember if we did dom manipulation in there. It was definitely used for video streaming though. There's a good chance we only used it for mjpeg and canvas shenanigans.