PaladinNO: While I inherently don't like limitations like this, may I ask why you would want to use lower rarity quickhacks?
The higher rarity ones do more damage, can jump more times, longer effect durations etc.
I'm just looking for additional arguments, for I can list one reason why we should be able to use lower quickhacks: when I need to take out a single - SINGLE - target for a mission, quickhacks that jump even once will lead to the missions failing.
Well, I read something somewhere about doing the Cyberpsychos non-lethally being easier with green or blue... I forget which hack, one that does electric damage, but the purple and orange one cause an explosion which can be lethal.
But for me, someitmes I just don't need the extra functionality that the higher rarity provides and would rather have the cheaper RAM cost of the lower rarity version.
EDIT: It's Cyberware Malfunction. The blue one lasts just as long as the purple one, costs 1 RAM less, and doesn't have the explosion, which may kill the target.