The important difference between traditional RISC and what we have now in either x86 or ARM is the instruction encoding. You have to have a compact instruction

The important difference between traditional RISC and what we have now in either x86 or ARM is the instruction encoding. You have to have a compact instruction encoding or you waste memory bandwidth. That's part of why x86 eventually beat the old RISC designs and that why ARM has the Thumb encodings.