Currently, Plume developers have less time and Plume is not actively maintained. New features may take time to be implemented. Could you consider similar purpose software: WriteFreely, WordPress with ActivityPub plugin and so on?
But there still is a lot of recent releases activities...
WriteFreely does not seems to be a good idea as a multi user instance on the server but a good consideration as a stand alone blog tool that any user can install by itself.
Both project are lightweight multi users federated blog platform.
Technically speaking, Plume seems to be more strategic for us.
Plume
https://git.joinplu.me/Plume/Plume
But, on the website main page we can read this:
But there still is a lot of recent releases activities...
WriteFreely
https://github.com/writefreely/writefreely
WriteFreely does not seems to be a good idea as a multi user instance on the server but a good consideration as a stand alone blog tool that any user can install by itself.