My prior UPS maintenance guy had some war stories from that time. He said prior to the event, it was the busiest he's ever been. He was either replacing affecte

My prior UPS maintenance guy had some war stories from that time. He said prior to the event, it was the busiest he's ever been. He was either replacing affected hardware or performing software updates to solve the issue on Liebert UPSs. He spent New Years in a DC of a big financial firm in NYC. Apparently the firm was so worried about a failure they shelled out big bucks to have UPS maintenance staff onsite during the cut-over "just in case".