As a page editor, I want to be able to select another editor to edit a page, so that I can use my favorite editor on any page.

Currently when moving or renaming a page, all existing links point to the old page. The correct behaviour would be to update all links to the new page, either optional or explicit.

Images should be pasteable via clipboard ctrl+V as a shortcut, similar to how Github's MD editor works. This would be a gigantic time saver.

There are a lot of embedding suggestions here. Some a lot of upvotes. As a user this is what I care about for future features as wiki.js works really well for everything else. I would like to embed a twitter feed. I would like to embed a facebook feed. I would like to embed a youtube video. I would like to embed html widgets. I would like to embed a pdf. I would like to embed... a lot of things.

It would be great to have a way to allow guests to modify pages, in order to have the classic wiki experience

I'd like to clean up the login form and hide the authentication provider list from login form if only one provider is active and switching is not possible / makes no sense.

Give the option to change favicon via administration

We need that you can restore backup from a SFTP server.

Any possibility of adding multiple wikis within a single installation? Much like bookstack , it'd be great to have at least one extra level of organization (equivalent to "books" in bookstack).

It might be hard to integrate, but it would be a killer feature that no other wiki offers. Perhaps you could use ShareDB: https://github.com/share/sharedb https://en.wikipedia.org/wiki/Operational_transformation