Magical exhaustion would mean cutting off his finger with a restored Hermione. That's why the rock was transfigured into a jewel and not a ring.
I’m not trying to imply anything naughty here, but Hermione is somewhat softer than that rock. (Until you see her angry.)
Not to mention he doesn’t have any obvious need to keep Hermione on his finger all the time, unlike the rock. Just long enough to find some safe spot to hide her. (Unless he plans to revive her within the next couple of days.)
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 88-89. The previous thread has passed 500 comments.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: