I have tried to read everything during RJ's journey. I haven't seen any reference to whether he is writing or not.

 

I imagine there are times when he is unable, but I am wondering if he is trying to write during this time or if he is going to wait until his battle is over.

I believe his official website says that he is not writing fulltime, but still making small progresses on the Memory of Light.

He is writing, but not nearly as much as he used to. His usual work habit was to do between 8-10 hours a day, six days a week. I'm not sure how much it is now, but I expect its somewhere close to 2-3 hours a day, four or five days a week right now. Perhaps less.

The Forbes article says about 2 hours a day is all he can handle. Granted it's a few months old, and doesn't tell how many days a week.