Been thinking about moving off microblog.pub to something else, primarily because it's getting far too slow for what it is. Unfortunately things don't look promising, it seems like there's no good way to migrate existing content to the new account, and replacing the engine in-place is also a source of endless issues. https://voidfox.com/blog/the_sisyphean_effort_of_activitypub_migration/ is a good writeup from about two years ago that covers some of the issues.
This is very annoying. I guess I could pour a bunch of effort into optimizing microblog.pub, but I so don't want to get involved with python.