This is a very, very wrong, and unnecessarily harsh and personal in its wrongness, comment. The person you are replying to is dead on and I suspect you are conflating &quot;I support a lot of virt environments in my profession&quot; with the state of the industry.<p>At scale, in prod, virt is legacy. Aside from Linode where I obviously ran virt, the only virt I&#x27;ve ever touched in private datacenters is relegated to labs or testing farms. We have a lot of tech, both from supercomputing and the new valley stuff which is inexplicably rewriting all of that, that makes virtualization completely unnecessary outside of a multitenant situation with separate paying customers and security domains. Even there multiple vendors are working on it, notably Intel, who is pushing VT-x into containers with multiple efforts.<p>Don&#x27;t be so confident to talk about reality, because yours is very different from mine. The original poster was unguarded with their claim but in terms of winds of the industry, they couldn&#x27;t be more correct, and if you think I&#x27;m wrong you&#x27;re on the wrong side of the shift that is coming, nigh already here.<p>Example: We bought space in Virginia for Foursquare and didn&#x27;t deploy a single byte of virt. My current employer has dozens of facilities and virt is a lab thing. No prod, anywhere, across dozens of products and lines and organizations, uses virt. Google doesn&#x27;t, right you are. Nor does Twitter, who is deep into Mesos (same for everyone who is also deep into Mesos or its many friends).<p>You might scoff and say well, my CIO says, and you&#x27;d be correct today, but the state of the art for resource utilization at scale moved away from virt because we figured out that running full operating systems next to each other as a bandaid for bad CD and provisioning and resource allocation stories is a shitload of overhead for zero gain. There is absolutely nothing that virt gives you, aside from a perf hit and unpredictable low-level behavior (some of us care about cache lines and context switches), which cannot be implemented with tooling atop bare metal platforms. Virt makes your hot aisle hotter so you don&#x27;t have to figure out bare metal provisioning. You should care about that, then figure it out. It&#x27;s not hard.<p>If you are strongly convinced that I&#x27;m wrong, much like your neighbor posters, the state of the art simply hasn&#x27;t made it to you yet. Sorry. You should be willing to consider, however, instead of sniping at change like your tone will keep it at bay. There is a lot of denial in this thread, and it&#x27;s trivial to deduce why that is.