Meanwhile, happy to answer any questions about the Cerulean mad science experiment :)
I am curious how this experiment fits with the longer term goals for the project. Do you see Matrix as a social media protocol in addition to chat? If so, do you have plans to integrate with the fediverse/speak ActivityPub?
I think something like Cerulean may even be a better idea. It would probably be straightforward to just make every blog post create a corresponding Cerulean/Matrix post and then have a link to it automatically inserted into the bottom of the post.
One question I have, though, is how performant it is to have thousands and thousands of these small Matrix rooms around. Are rooms that lightweight? One for each post seems like it could be a lot, but I'm not familiar with the intended internals for servers to use in how they represent rooms.
Totally agreed that turning Cerulean into a Disqus-clone would be awesome; hopefully someone will pick it up and do so!