problem was that US attack helicopters were rather limited. The MI-24 in comparison was able to use its own extensive storage capacity to reload and refuel in the field without returning to base. Armour and survivability was also significantly better reflected in the 333 helicopters lost in afghanistan compared to the 5600 Helicopters lost in vietnam.
Again, the requirement for a prop driven COIN aircraft wasn't really there as the soviets did not really like wasting resources on coin specific equipment, when equipment designed for the conflict deemed important (mechanized warfare against NATO) with minor field mods would do. The tendency when equipping allies seemed to be in the same vein even if the conflict they fought was primarily a COIN conflict.
Again, the requirement for a prop driven COIN aircraft wasn't really there as the soviets did not really like wasting resources on coin specific equipment, when equipment designed for the conflict deemed important (mechanized warfare against NATO) with minor field mods would do. The tendency when equipping allies seemed to be in the same vein even if the conflict they fought was primarily a COIN conflict.