In reply to Richard Ginn.

You don't.

That's not why it is there.

Its just that in WordPress 5.x [supposedly], it will be used by WordPress to do that job as well.

The net net of which, is that it will programatically change the underlying content construction, but you will continue [as now] using the tools you chose as being the best suited.

And Gutenbrick will sit there in every WordPress install, about as useful as the "Hello Dolly" plugin, or maybe even a bit more.

And in the meantime, all the wasted hours and focus expended on Gutenbrik could have been applied to take WordPress in the right direction.

Instead of down the rabbit hole.