'how can i watch yesterday's build? Every new release should restart bro. that
was wasted time' — a pass lost to a midiviz restarted the night before, which
therefore contained none of that night's four commits. systemd said active
(running) the whole time, correctly: a unit holds whatever the interpreter read
at ExecStart, and from outside there is nothing to distinguish it from a unit
on current code.

Comparing the unit's ActiveEnterTimestamp to its ExecStart file's mtime is the
only honest test, and it is deliberately not a git comparison: the question is
'is the process executing what I can read', so an uncommitted edit counts.

ADVISE, never BLOCK — a stale lens is not a reason to refuse a launch. --fix
restarts only the inaudible login units; SuperDirt and the two painters are
reported and left alone, since gig-up's generation-aware chooser owns when
those cycle.