It's not a simulation, it's real-world production technology.

https://en.wikipedia.org/wiki/Technical_details_of_Netflix

I think they meant that Netflix Chaos Monkey is a "simulation" of the real-deal, which is sending a shaved-ape into a physical server room and pulling out physical network cables. I didn't read it as derogatory.

Oh perhaps they did mean shaved-ape simulator. I read none of it as derogatory, and hopefully my response didn't suggest otherwise.

And it's OSS: https://github.com/Netflix/SimianArmy/wiki/Chaos-Monkey