I wrote a book in Word. It was a nightmare, but a useful one: a version conflict across users or something in the copyediting phase glitch-deleted all the math

I wrote a book in Word. It was a nightmare, but a useful one: a version conflict across users or something in the copyediting phase glitch-deleted all the math from a chapter ... but in laboriously reconstructing them I found and fixed an error in the original. So thanks Microsoft?