It's not that simple. Without PAM support, tmux is already broken, even on non-systemd distributions, in some corner cases. E.g., starting gpg-agent the "wrong"

It's not that simple. Without PAM support, tmux is already broken, even on non-systemd distributions, in some corner cases. E.g., starting gpg-agent the "wrong" way breaks it inside tmux sessions, even on sysvinit, if tmux does not register PAM sessions. But, of course, because the bug is only seeing wide-spread attention since systemd triggers it more often, it can't get fixed, because Lennart is the reason we cannot have nice things. Or something.