FTE is a business concept, not a technology. AI agents become FTEs only when they are treated like workers: fixed cost, defined responsibility, measurable output. This is now being called Digital FTEs or FTE AI Agents. Digital FTEs excel at structured, repetitive, high-volume work. Humans remain essential for judgment, strategy, and complex decisions. The future workforce is AI-first, human-supervised not AI replacing people, but redefining capacity.