Unfortunately no mention of V86 even in the intro/history section, which could be considered the origins of x86 virtualisation technology, and achieved widespread use starting with Windows/386 and all the way through the Win9x lineage. If you've ever used those versions of Windows, you've used a hypervisor.
Anyone who enabled WSL2 was also running Windows under Hyper-V so that Linux could run at the same level. (The same thing virtualization-based security uses.)
It looks like course details are linked in the sidebar to the right:
https://opensecuritytraining.info/AdvancedX86-VTX.html
(perhaps this URL would have made more sense for submission, per "Please submit the original source"?)
VT-x is not a RISC-V feature, it is a feature of x86 cpus, which is definitely not deprecated. VT-x is (as far as I know) the technology that allows acceptable speed virtualization of virtual machines, which is the backbone of cloud computing. RISC-V H extension is not applicable to intel CPUs even if it provides features that solve similar problems (ie it cannot possibly be the replacement).
