[lima]

...on a single-zone persistent disk: https://status.cloud.google.com/incident/compute/15056#57195...

> GCE instances and Persistent Disks within a zone exist in a single Google datacenter and are therefore unavoidably vulnerable to datacenter-scale disasters.

Of course, it's perfectly possible to have proper distributed storage without using a cloud provider. It happens to be hard to implement correctly, so apparently, the SK government team in question just decided... not to?