Interesting. Does anybody know why Slackware hadn't used pam before (apart from general dislike of bloat)? I mean being RedHat's first original contribution to Unix AFAIK it's rather old at this point, and even RedHat now focus on enterprise cloud (open shift, cri-o, podman, buildah, etc) where supposedly "container" auth based on OIDC and authz is preferred (but not sure actually since they also advertise sssd to route pam requests to hosts).