[Mobhack]

Molotovs are flame weapons - so they can bypass armour to get in via the engine grilles etc, they have added morale effects beyond "mere" HE on the targets (and any other5s in the same hex) and they can cause fires that block LOS (which can be a disadvantage at times, e.g blocking your own ATG and tank's LOS).

Flame weapons are therefore expensive. So I usually prefer the anti-tank grenades, if they have HEAT that is worthwhile (if assaulting they usually go for the weakest armour - usually top), or can be fired at range if rifle grenades. Being able to slot little scout cars at 3-4 hexes is useful.