The only time I think it makes sense if if you're doing a belt+braces with colo'd stuff in a datacentre.
The DC will have its own UPS system, but in the event it all goes wrong (which happens more often than I'd like) you probably want something in your cab that can give your equipment notification and time to shut down safely, and provide surge suppression and maybe some level of isolation from the inevitable back-emf caused by the rest of the hall going dark.
The DC will have its own UPS system, but in the event it all goes wrong (which happens more often than I'd like) you probably want something in your cab that can give your equipment notification and time to shut down safely, and provide surge suppression and maybe some level of isolation from the inevitable back-emf caused by the rest of the hall going dark.