There is a lot more than a simple chroot to Docker though - with FreeBSD Jails being a stepping stone along the way. It's real innovation and why it won over alternatives was the tooling and infrastructure around the containers - particularly distributing them.
You're missing image distribution, namespaces (networking, pids, mount, users), seccomp (to limit root powers), cgroups (to limit cpu and memory usage), and so much more. There's also Docker Hub with the official images they maintain. And the Desktop tooling makes an embedded Linux VM much easier to work with than spinning up your own VM, copying files around, and forwarding networking ports.
Ah - the old magic.
There is a lot more than a simple chroot to Docker though - with FreeBSD Jails being a stepping stone along the way. It's real innovation and why it won over alternatives was the tooling and infrastructure around the containers - particularly distributing them.
You're missing image distribution, namespaces (networking, pids, mount, users), seccomp (to limit root powers), cgroups (to limit cpu and memory usage), and so much more. There's also Docker Hub with the official images they maintain. And the Desktop tooling makes an embedded Linux VM much easier to work with than spinning up your own VM, copying files around, and forwarding networking ports.