Ok so all those whisperings were getting ouder and louder in my head and I had to just let it out. The video is by Greg Hartman and my industry insider friend, who wishes anonymity, had some pointers: Featured opinion from an industry insider/researcher (This individual has no affiliation to VMware, Citrix , Microsoft or whoever): o The rate-of-change has gone up significantly, and fairly uniformly across all parts of the kernel (core, arch-specific, device drivers, networking, etc). It's greater than any other software project on Earth. It's also broaden out (flattened), with lots of changes coming from a broader set of people. o KVM will win out over the Xen/VMware models. KVM uses Linux as the hypervisor, whereas Xen needs to recreate its own NUMA model, scheduling, memory management, power management, and needs to use Linux for drivers. KVM gets all these things for free from Linux (Qumranet's opinion also). Combined with the rate of change and massive amount of contr...