Where I live (in the UK) the power is reliable enough (one outage every 3-5 years) that I only tend to spec UPSs for devices with dual PSUs - one raw mains, one

Where I live (in the UK) the power is reliable enough (one outage every 3-5 years) that I only tend to spec UPSs for devices with dual PSUs - one raw mains, one UPS-protected. I've had more UPS failures than mains failures in the past decade... and mains power will normally come back up, starting the equipment automatically, while failed UPSs generally require manual intervention to fix, and consequently much greater downtime...