Author here.  My goal is to (eventually) host a toy key:value store on top of a unikernel.  So the KV store would need to persist data to a writable file system.  It&#x27;s great when you don&#x27;t need to alter state and the unikernel can be immutable (baking config into code ala Mirage, etc)...but something like a KV store can&#x27;t get away with that.<p>But, the KV store + unikernel is mostly for fun, so may not be the most practical of real-world ideas anyway :)