I understand your perspective, but I think it's GREAT that it targets Arm. If anything finally can and finally should replace x86/64, to usher in a new era of power-efficient computing, it should be Arm.
> the story for performance-per-watt under load appears less clear.
Is this referring specifically to their in-order cores (Cortex-A53, A35), out-of-order cores (Cortex-A72, A73), or big.LITTLE configurations in general? *
Thinking more broadly, the next era of power-efficient computing may depend more on heterogeneous architectures than the CPU alone. The Arm ML Processor IP and corresponding offerings from competitors play a large role in this.
* Can be generalized to custom cores designed by NVIDIA, Qualcomm, Samsung, Apple, and other vendors.