Another idea related to backlinks is to support placeholder links.
Let’s say you create a link with an empty uri like so:
[This is a link]()
It will looks like a normal link in the preview, but when you click it, the app will create a new note with a title “This is a link” in the same notebook and insert the link URI to the current note.
So, you don’t need the wiki-like “[[***]]” syntax to accomplish the wikilinks while preserving the full Markdown compatibility.
I’m currently planning to support it in the future.