Since Nextcloud 12 has implemented the new ActivityPub ( https://activitypub.rocks/ ) standard for federated activity streams: Are there plans to implement a Mastodon (https://joinmastodon.org/ ) compatible public facing microblogging app?
It could probably be derived from the activity app, but with settings what kind of activities to display publicly (and federate them) and for adding personal twitter like messages.
This is interesting because many federated microblogging services (not only Mastodon) are also implementing support for ActivityPub and thus Nextcloud could join this new chapter of the fediverse.
See also: