[jp10]

IMO, effectiveness of any weapon against a specific target type is subject to too many situational circumstances to support generalization.
I believe the current conflicts in open, arid or mountainous terrain has magnified the effectiveness of Helibourne weapon platforms against Infantry, especially at night. Slow movement, lack of concealment or detection range reducing terrain/vegetation have produced videos of effective cannon fire against dismounted targets especially when in close formation in darkness or restrictive terrain.
Attack Helicopters outside of air superiority situations rely on staying on the edge of the battle area and making pop-up attacks on targets worth the expenditure of expensive weapons. The cannons firstly were thought of as close range defense for the helo.
AC helos are IMO, not stable AC platforms and are more suppressive in effects against dispersed Infantry in other than clear terrain and are acceptable as modeled in game.