Woah woah ... this is legit awesome! Just tested (on lemmy.ml) and yep ... seems to be working like a charm!
Give up to matc-pub for the PR (and maybe a new core dev for lemmy too?).
I figure this makes live megathread style posts/chats more viable ... which is certainly cool!
I've mentioned this before, but an interesting possibility might be to enable selected posts to be "live chats" through a websocket like process as lemmy used to be, just for selected posts for certain windows of time, whenever a live chat dynamic is sort.
It's the sort of thing that could be scheduled and subject to admin approval or something if resources are a concern.
Otherwise ... awesome to see!