[happymellon]

Presumably this, Unprivileged Name Spaces getting blocked by Ubuntu. Not sure if anyone else is doing it.

https://ubuntu.com/blog/ubuntu-23-10-restricted-unprivileged...

[LegionMammal978]

It seems that until 2020, Debian used to block them as well [0]. So perhaps some of my perceptions are out of date. In any case, it means namespaces are unreliable to use for the typical Linux program.

[0] https://salsa.debian.org/kernel-team/linux/-/commit/a3819178...