The problem is that you need a large percentage of your vehicles equipped with this, because you never know which one will be taking part in a pursuit. And even

The problem is that you need a large percentage of your vehicles equipped with this, because you never know which one will be taking part in a pursuit. And even if you're lucky enough to be taking part in the start of a pursuit with an equipped vehicle, surely the darts don't have a 100% hit rate.