Fascinating, but I'm not sure how these are consistent?

- Based on classic Z80 architecture by Zilog - Inspired by modern RISC designs (ARM, RISC-V, MIPS)

The Z80 itself was "inspired" by the 8080, notably having dual 8080 register sets. It might be regarded as a "clear" (sic) room reimplemention/enhancement of the 8080 given that it was the same 8080 designers who left Intel to found Zilog and create the Z80.

Z80 is CISC. This looks like a MIPS.

Funny enough, there is a 32-bit version of Z80 called Z380.