If I understand right, here's one instance I may find it useful:
FanFicFare adds an additional 'crossover' tag to #fanficcat when there's multiple entries. For certain sets of entries, I don't want this.
Since this isn't easy to work around in the FFF settings, I use a template to take the column, sort the entries, compare the string, and then replace if it matches:
Code:
program:
f = list_sort($#fanficcat,0,',');
if contains(f, '^Crossover, Mass Effect Trilogy, Mass Effect: Andromeda$', '1', '')
then 'Mass Effect Trilogy, Mass Effect: Andromeda'
elif contains(f, '^Crossover, Half-Life, Portal$', '1', '')
then 'Half-Life, Portal'
else $#fanficcat
fi
But my current solution working fairly well, so it's not a big deal either way.