Just a nitpick: Virtualization was pioneered by IBM S/370 mainframes, CP/CMS and the like. Author is talking about virtualization on desktop/x86 specifically.

Just a nitpick: Virtualization was pioneered by IBM S/370 mainframes, CP/CMS and the like. Author is talking about virtualization on desktop/x86 specifically. Unfortunately, for historical reasons (microcomputer revolution), these are separate worlds.