AI clears the easy contacts first. What’s left stops being a volume game and becomes an AHT game - you can’t staff the leftover share at your old average handle time.
Blue = humans you really need. Grey = the under-count from staffing on average. Red = the floor, even at 100% AI. The blue-grey gap is the shortfall.
Clean-model result - real WFM can re-add a mid-range sweet spot via staffing steps, shift minimums, vendor tiers, fixed fees, or SLA penalties.