Yes, #systemd switching everything over to #pidfds.

* Most of the internal process tracking is being changed to use PIDFDs instead of PIDs when the kernel supports it, to improve robustness and reliability.

https://github.com/systemd/systemd/blob/main/NEWS

Draft: jsauthority: add 'system_unit' subject attribute (!154) 路 Merge requests 路 polkit / polkit 路 GitLab

When building with libsystemd support, query the systemd unit name that the process if part of (if any) and add it as a subject attribute. Allows allow-listing actions...

GitLab