As of 2025 and much earlier, there were only 3 operating systems that mattered on desktop:We refer to them as "the three operating systems".
Each microarchitecture appears to fully specify all core parameters, it feels likely that they just reuse most of all of the RTL, or even pre-synthesize core blobs.
Bibliography:
- www.quantamagazine.org/how-smell-guides-our-inner-world-20250703/ How Smell Guides Our Inner World (2025)
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