Yeah, Singularity is an amazing existence proof of lots of cool stuff in the unikernel-ish space (though, sadly, not quite of anything being suitable for <i>production</i>).<p>Is Singularity a unikernel? More specifically, would the unikernel.org folks consider a production-ready kernel inspired by Singularity and targeting a hypervisor to be a unikernel? The 2013 paper&#x27;s introduction section contains the sentence, &quot;By targeting the commodity cloud with a library OS, unikernels can provide greater performance and improved security compared to Singularity [4],&quot; so I&#x27;d imagine no. But I don&#x27;t see any expansion on that point, so I suspect it was added to appease a reviewer.