To my knowledge AWS EC2 uses (a derivative of) Xen, Google uses KVM and Microsoft Azure uses Hyper-v. Now AWS is making inroads into KVM with Firecracker, does this mean that the days of Xen are counted?<p>Edit: Brandan Gregg introduces Nitro (<i>based on the KVM core kernel module</i>) <a href="https://news.ycombinator.com/item?id=15812803" rel="nofollow">https://news.ycombinator.com/item?id=15812803</a> in nov ‘17