virt-manager uses QEMU/KVM by default. Some distros do work in containers too.
Xen turn your PC into a hypervisor. Where you can switch your OS without much hassle.
Making each OS boot on bare metal will make you cry if you want to be able to boot several different OSes.
I haven't used
lsp
for a while, but it seemed like a good$PAGER
.https://github.com/dgouders/lsp