There he analyses existing RISC and CISC architectures, and counts various features of their instruction sets. They clearly fall into distinct camps.
But!
Back then (mid 1990s) x86 was the least CISCy CISC, and ARM was the least RISCy RISC.
However, Mashey's article was looking at arm32 which is relatively weird; arm64 is more like a conventional RISC.
So if anything, arm is more RISC now than it was in 2001.
There he analyses existing RISC and CISC architectures, and counts various features of their instruction sets. They clearly fall into distinct camps.
But!
Back then (mid 1990s) x86 was the least CISCy CISC, and ARM was the least RISCy RISC.
However, Mashey's article was looking at arm32 which is relatively weird; arm64 is more like a conventional RISC.
So if anything, arm is more RISC now than it was in 2001.