I also think that doing it only for online users would reduce the server load a little.

@julian Maybe you can do it only as a plugin or option to disable it in the administration panel or the user.Then if someone has problems with a server overload or with notifications it will disable it. This could be a compromise between supporters and opponents of this add-on.

I also think that doing it only for online users would reduce the server load a little.

It looks interesting, I'm sure there would be bloggers who would like to write their own blogs.

It would be a good solution to keep users from posting a topic because they will know that someone is responding.