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by userbinator 1377 days ago
within a factor of 2-3

That's still a huge difference, and as I mentioned above, the 8051 is found in applications which are very sensitive to cost. In terms of gate count, the lowest numbers I could find for a RISC-V core are in the 10-20k range, while an 8051 goes down to 2.7k:

https://www.electronicsweekly.com/news/design/eda-and-ip/805...