The various formulae for landing distance provide margins, but real world surface conditions and variations in touchdown point, weight and speed (seemingly minor approaching the threshold) can blow past those margins.
Instituting larger margins can require lower weights and reduce revenue.
An FOQA program would do well to monitor performance on shorter runways and raise flags when too much margin is getting used.
A really clever FMS could take in groundspeed, weight and expected touchdown point against runway remaining and possibly recommend go around, but at what point in the approach?
Better an EMAS excursion than a failed go around.