I don't understand what use an IFV gets from having ATGMs, other than making it more expensive so you can have fewer of them. I guess that's why most IFVs don't have ATGM launchers. Ambushing tanks is not an IFV's job and is best left to more dedicated AT platforms. If an IFV stumbles upon an enemy tank force its best course of action is to pop smoke and skedaddle. Not stop and remain stationary for half-a-minute while it erects a missile launcher, fires and guide a missile all the way to its target. The troops it carries are far more suited for setting up an ATGM ambush with crew portable weapons. Leave the IFV parked in dead terrain so the infantry can relocate quickly and unseen in the confusion after the trap has been sprung. I don't know if that makes sense to anyone but me?