I don't spend a lot of time on those comparison-style charts if I'm honest, but that is good (and valid) feedback for them. I also hadn't heard of it, I discovered sysbox via jpettazo's updated post at https://jpetazzo.github.io/2015/09/03/do-not-use-docker-in-d..., he's an advisor of nestybox the company that develops sysbox.

For the CI/CD usecase on AWS, sysbox presented the right balance of trade-offs between something like Firecracker (which would require bare metal hosts on AWS) and the docker containers that already existed. We specifically need to run privileged containers so that we could run docker-in-docker for CI workloads, so rootless docker or podman wouldn't have helped. Sysbox lets us do that with a significant improvement in security to just running privileged docker containers as most CI environments end up doing.

Just switching their docker-in-docker CI job containers to sysbox would have mitigated 4 of the compromises from the article with nearly zero other configuration changes.