User blog comment:The Milkman/No More Mass Effect/@comment-5038903-20120605191421/@comment-5503561-20120605192201

Were you paying attention at all? "Copying code is insufficient. Direct personality dissemination required."

Ergo, he'd have to distribute himself across the geth consensus to make each of them a fully evolved AI. Kinda like Shepard does with Synthesis to give everyone this techno-organic circuitboard glow.