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This actually makes sense for Intel. IF RISC-V is a superior instruction set to x86 and there is a groundswell of support building then it makes sense for Intel to fabricate a processor platform based on it. They don't have exclusive rights to x86 so it's not like they are abandoning a crown jewel. It just has a large base of support. They have wanted it to go away for a very long time and may have finally realized that having a proprietary processor instruction set just isn't going to happen.