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Possibly, I worked on a few "hot cuts"(moving one branch to a new site overnight so they can get running with 0 changes) and it was fine. Generally they tend to do infra upgrades though since new location cost way more than adding cables.

Banks are also weird places to work at. Proactive upgrades are denied, but if I make a mistake that costs us a year or two worth of my salary and nobody blinks an eye.