I think the "chaos" is more akin to the emergent properties of complex systems, where disturbances in one component can propagate in unexpected ways. "What wou

I think the "chaos" is more akin to the emergent properties of complex systems, where disturbances in one component can propagate in unexpected ways. "What would happen if..." experimentation doesn't negate the need for requirements. It seeks to actively test whether or not those requirements were adequate in the first place. It also recognizes that no system is static - almost all distributed systems are evolved over long periods of time. No matter how careful your planning, shit sometimes breaks in the real world in ways you didn't/could not have reasonably anticipated.