@Powersource

This should work fine with ooo, right?

Yes, it should. But if you're using ssb-ooo to retrieve messages you'll also want to use ssb-ooo to check for edits to those messages. Right now I'm not aware of any clients that use ssb-ooo, are you working with one?

orthogonal to deletable messages/blobs-as-messages?

This work with mutable messages won't make it possible to delete messages. I'm still using the secure-scuttlebutt log to create messages and then edit them. Using blobs as messages is a good idea, and you could always use this mutable message implementation to edit the blob hash you're linking to in order to point to a new blob. But it'll always be possible to figure out which blobs you were linking to before, so that won't make them go away forever.

Let me know if that answers the question, if not feel free to ask more questions!