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Heads-up: OpenBSD does not yet support power-saving on anything Arm64. The CPU will be running at full throttle the entire time, which will be a showstopper in some cases.

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Not true, CPU frequency scaling (apmd, cpu.setperf/perfpolicy) is supported on many ARM machines, including the ThinkPad X13s, Apple M1/M2 Silicon, Raspberry Pi 4 (but may depend on whether using EDK2 or U-Boot firmware).

Support for Snapdragon X Elite machines was added as recently as last month, even..

https://marc.info/?l=openbsd-cvs&m=175395733802655&w=2

Then I stand corrected. Seems I've had the misfortune of buying only the Arm SoCs/boards where OpenBSD so far cannot control the CPU frequency.

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