Comment by an esteemed colleague when discussing the need to purchase hardware to fix performance issues..
Software is like a gas.. it expands to fill all the space (capacity) available to it”
This is derived from Myhrvold’s law which states “As the software becomes more complex, the likelihood of problems tend to increase”. The original article is on Wired.com at http://www.wired.com/wired/archive/3.09/myhrvold.html.