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Alice packs have the perk of being more than one piece of gear. Drop the bag off at camp -- carrying back a fuckton of sticks for fire and shelter is less of a pain. They're also far cheaper than molle packs. Not having molle loops sucks, but they're plenty modable.
I'd rather do bushcraft with the alice pack. The 75l I have is saved for multi day hikes -- nature and travel.