I played a bit with Inform7 years ago. The only thing I remember experiencing was the disorientation of believing I could type in English (almost any logical sentence) and Inform would parse (the irony is not lost on me) the sentences and construct the logic behind the scenes. Then I became aware of what was really happening and was a little disappointed. 
(Also, I’m not saying the following to be argumentative in any way.)
Regarding self-documentation, watch this short 5 minute video…
(…that channel has a few gems of short videos that I urge all programming minds to watch.)
Regarding reduced cognitive load… having the separation of language between story logic and story narration is a plus for me. Now I’m programming, now I’m authoring a story.
I still think Inform7 is a great tool, and one day I think I’ll dive deep into it. Anyway, just food for thought from an outsider’s perspective.