The programmers in the Microsoft bug-fixing department must be in a wretched state, plumb worn out and worn down, like Buck and the other sled dogs in the Jack London classic The Call of the Wild: There was no power of recuperation left, no reserve strength to call upon. It had been all used, the last least bit of it. Every muscle, every fiber, every cell, was tired, dead tired. And there was reason for it. In less than five months they had traveled twenty-five hundred miles, during the last eighteen hundred of which they had but five days rest.”]
Source: https://krebsonsecurity.com/2012/10/microsoft-patches-windows-office-flaws/