>Specifically, AI+human developer no longer outperforms AI alone. So far, all the available evidence seems to show AI as a force multiplier for developers and that for good results

Or humans are relegated to the co-processor role. The AI does 99% of the thinking and work and consults the human for the 1% it needs. Whether that extra contribution is essentially a random number generation, creativity / outside the box input, or esoteric problem solving remains to be seen.