In the mid90s, I got a short tour of mission control through the IBM project manager that was redoing the control stations into modern workstations. (At that time, IBM's role at JSC had shrunk to a faint shadow of its former glory, but that is a much longer story.) The most shocking thing I learned was that all those mission control consoles were not static systems. Many (most?) of those consoles had major changes during each mission. Today, of course, we would just update some software to change indicator light/display label as needed during a mission. But back then, as soon as launch was over the engineers were crawling under the consoles, re-wiring many indicators to their new display functions for the next mission phase, putting new labels on the consoles, etc. I got an entirely new appreciation for the engineering requirements of mission control.