Jeff King [off-list ref] writes:
I actually consider "--no-optional-locks" to be such an aspirational
feature. I didn't go digging for other cases (though I'm fairly certain
that "diff" has one), but hoped to leave it for further bug reports ("I
used the option, ran command X, and saw lock contention").
OK, then we are essentially on the same page. I just was hoping
that we can restrain ourselves from adding these "non essential"
knobs at too fine granularity, ending up forcing end users to use
all of them.