It was November 13, 2009 when I had brain surgery. So twenty-one months. I had to pause and count that out on my fingers (and still wonder if I got it right), which I wouldn't have had to before the surgery.
There's still some interesting changes that seem to be permanent (like the loss of the listmaking compulsion I had all my life previously). But I'm off to a family reunion down the Jersey shore, so more later, perhaps.