Have you ever been lying on the floor of an equipment room trying to read the number on a cable in the bottom of a rack with fans buzzing in your ears and freezing air-con? The system’s an undocumented heap of garbage and you can’t move anything for fear of something falling over and leaving thousands of viewers staring at blank screens. Been there?
Even if you can guarantee that all cables have labels and better still unique labels (unheard-of luxury) it’s still a massive struggle to find where they’ve been moved to by those who call themselves engineers.
The cost of fixing these spaghetti systems is complete re-installation. That simple.