I don’t know how antithetical it is to the fediverse mentality. You could have a server that talks a wide variety of activity pub and on the client side you select your view and you can have a forum like view or microblog format, or a images format. I thought the whole point of the fediverse was interoperability between servers and services.

I have this account as primary, I have a backup on pawb, an abandoned one on world (different user name), and now one on furry.engineer. I think discovery is a core shortcoming of the fediverse. Activity pup can’t send everything everywhere if it doesn’t know where everywhere is.