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What would be your concern? M1/M2 is just arm which Linux has run on for decades?

I think the concern is there is currently no 'IBM-compatible'-like hardware ecosystem around ARM. Raspberry Pi is closest, but nothing mainstream yet. And it looks like RISC-V will have a better chance than ARM.

You're right.

RISC-V barely has any end-user visible deployment yet. Despite that, it has strong platform standarization (OS-A Profile, RVA22 and standardized boot process through SBI, UEFI specs).

This is all just in time for VisionFive2, just announced. I suspect it will ship in large amounts.

Linux support is about much more than instruction set support. Most ARM chips are shipped on SoCs which can take a lot of work to get Linux running on, and even then it might not run well.

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