Never change a running system :o
“This is the weakest point of the current practice: the deployment of complex systems on a heterogeneous, distributed platform is typically a nightmare, the required system-level testing is virtually unsupported, and maintenance and upgrading very often turn out to be extremely time consuming and expensive, de facto responsible for the slogan “never change a running system”.”
Going on such as the recent Jaguar Land Rover hack. I am becoming less and less impressed with the whole; virtual machines (VM) running on software define networks (SDN) running virtual applets in the “CLOUD”.
Tata establishes global digital infrastructure for Jaguar Land Rover