&gt; (ESXi might be another story, but it&#x27;s also not just a hypervisor, it&#x27;s a whole stack of enterprisey proprietary infrastructure that you commit to instead of open systems, and hopping on that train is more a cultural&#x2F;strategy&#x2F;mindset choice than something based on technical hypervisor-vs-hypervisor benchmark)<p>I may be wrong here, but I thought ESXi was the lightweight hypervisor-only product (which at the time was offered for free!), without all the enterprisey features or requirements.<p>Basically Microsoft Windows Hyper-V without the need to boot an OS of its own.