I cannot emphasise how exciting it was to correct a typo that I found in the book by simply opening the page. In the past corrections of EXP had involved reprinting pages, or in some cases waiting for the next print run. Which could mean people pointing out particularly egregious spelling errors over and over again. A few moments ago I noticed that I had created the brand new word “compuunds’ and corrected it to compounds in a few seconds. Woot! This is so much cheaper than printing a book.