Hate to nitpick, but a comparison to bare namespaces wouldn't be apt, either, as Docker et al use more features than just namespaces in their container implemen

Hate to nitpick, but a comparison to bare namespaces wouldn't be apt, either, as Docker et al use more features than just namespaces in their container implementations, like control groups, union/overlay/snapshot file systems, nftables, etc. For several of those questions about jails, the answer would be the same if you were just evaluating the questions against namespaces by itself.