> Now imagine declaring an extended period of time where, in the interest of reducing risk(!), no new code is deployed, and Chaos Monkey is disabled.

I remember reading about similar experiment in biology:

If you have a petri dish full of bacteria, and you gradually introduce antibiotics, not only will your bacteria population grow resistant to the antibiotics over time, but there metabolism even might become dependent on it.

You see, biology is a system as least as complicated as any computing infrastructure we have.

(Compare also most organisms these days being reliant on oxygen. Or how humans lost the ability to make vitamin C in their bodies.)