Final word on ReST like directives?

There are a number of discussions here about attributes (and they look very promising.)

Is there a definitive answer on when we’ll see attributes & directives as part of the CommonMark?

It’s be great to be able to fully start using markdown, compared to ReST, for Sphinx, in particular using directives like …toctree:

and code markup like here:

Would be extensions, so this is in the wrong category.