Fantastic survey of containers/virt. I wish I had this 3 years ago.
Would you consider adding Incus to this page?
I had worked at Canonical for a brief time and met Stéphane Graber there and when Canonical decided to take LXD away from linuxcontainers.org (home of lxc-utils) Stéphane took the principled stand to leave Canonical. Another fellow forked LXD into Incus and the linuxcontainers.org team, including Stéphane, has been developing it ever since.
conansysadmin