- Works on mobile (like Quill, Prosemirror)
- Does not support collaborative editing (unlike Quill, Prosemirror)
- Has somewhat unique block-based editing UI - think Notion (the data models of most editors support this, but the default UI of editorjs is much more explicit about this)
- Not built on React (like Quill, Prosemirror, but unlike Slate and Draft)
The mobile support looks quite mature, and I think this could be a good competitor to Quill and Prosemirror for single-user editing.
Per my previous comments (1), I think for new projects, going with Prosemirror or Quill are still great choices. I've tried Draft and Slate and both of them have lacked good mobile support and collaborative editing.