If such a spec was released before LaTeX was released, it might have stood a chance. Now everyone is used to LaTeX, no-one will switch, because there is simply

If such a spec was released before LaTeX was released, it might have stood a chance. Now everyone is used to LaTeX, no-one will switch, because there is simply too little benefit. While I appreciate the effort that has gone into it, and I can definitely see the merit in some cases, there are some awkward unicode characters that you need to use; very inconvenient.