Is that part even necessary? Even linear growth with a higher constant factor than humans have due to faster iterations could rapidly outgrow human capabilities if we take a hypothetical human-level AI as starting point.
But the important question is whether Moore's law is a necessary part. There's a big difference between "a redundant part, if it fails, the whole thing continues" and "a necessary but not sufficient component".
Is that part even necessary? Even linear growth with a higher constant factor than humans have due to faster iterations could rapidly outgrow human capabilities if we take a hypothetical human-level AI as starting point.