You mean something like this? https://www.atx-upsu.com/ https://www.atx-upsu.com/ Looks like it's capacitor-based, removes the need for an inverter, and even

You mean something like this? https://www.atx-upsu.com/ https://www.atx-upsu.com/ Looks like it's capacitor-based, removes the need for an inverter, and even has a clever way of communicating to the host, by taking over the power switch connector. Unfortunately, I can't seem to find a price or where to buy. Would love to see more momentum around products like this, and marketing directed at home systems. EDIT: Thought of one more system that uses capacitors to limp to a clean shutdown--the Unifi Cloud Key Gen2. Again though, the power solution isn't packaged for consumer use. Though, maybe it'd be amusing to try to hack together a NAS out of Cloud Key Gen2 Pluses... there's a hard drive bay in each one ;D