But you don't get that great UI. I'm the world's biggest Linux cheerleader; one thing you never hear is that almost every 'modern' Linux has a hypervisor built

But you don't get that great UI. I'm the world's biggest Linux cheerleader; one thing you never hear is that almost every 'modern' Linux has a hypervisor built-in (KVM/QEMU) to it. PVE is basically Debian with a wonderful web-UI wrapped around KVM/QEMU. You don't really need it, but it sure makes life easy!