I looked around and struggled to find out what it does?
My guess would be that it notifies you of when new posts are made to communities you subscribe to. But that sounds like a lot, so I’m really not sure.
Otherwise, is it me or does the wording here not speak for itself?
Oh I get what you mean now. Yeah, live threads are probably fine. There wouldn’t be the same overhead of every single user being permanently connected to the server, only the ones actually on the thread. So long as every thread wasn’t a live one it would probably be fine.
To be fair, the existing polling solution might be able to be leveraged for this as well. I think it’s probably not so much a technical challenge as it is a nice to have feature when Lemmy doesn’t have a lot of must have features (though it’s improving).