For those looking the highest performance for both gaming and multithreaded productivity software AMD released new 16-core 9950X3D CPU. 16 cores, 8 cores with x3D cache. Slightly lower pure gaming performance than 9800X3D but absolutely smokes 9800X3D in any sort of multithreaded software. And it's going to cost a lot.
16 core x3D requires usage of Xbox Game Bar so that the operating system can prioritize cores with extra cache for the games so it isn't as "fire and forget" as the 8 core variants.
From GamersNexus review as it relates to Stellaris:
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Full review: