Updated with upstream bug #; this seems to be an on-going concern, and depends on some not-yet-available interfaces between kernel and systemd.
Marking Triaged/Medium. There are some bypasses discussed in the upstream bug, but not all possible effects have already been discussed (for example, setting 'storage=volatile' completely loses the journald logs at shutdown).
Updated with upstream bug #; this seems to be an on-going concern, and depends on some not-yet-available interfaces between kernel and systemd.
Marking Triaged/Medium. There are some bypasses discussed in the upstream bug, but not all possible effects have already been discussed (for example, setting 'storage=volatile' completely loses the journald logs at shutdown).