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There are only really two drivers for RISC-V at this point - license fees and Arm's insistence that unless you are Apple, you have to comply with the ISA exactly.

Both are something Arm can adjust at any point and is in the process of adjusting post-Nvidia-collapse. All it is going to take is for Arm to stand up a review process to deal with the problem gracefully.

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There's a third one: ARM doesn't allow you to license your ARM cores (of your own design) to third parties. Only ARM can do that.

Just curious, where aren’t they complying with the ISA? I know they use a couple registers in specific ways, but IIRC, the way they use it was left to the implementer so they aren’t diverging from the architecture.

You can find more information here:

https://news.ycombinator.com/item?id=25801500

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