MIPS (R2000) did not outdone Intel and/or Motorola at the time, those last, but not least two enjoyed all "economics of scale" of the world. MIPS was slower cl

MIPS (R2000) did not outdone Intel and/or Motorola at the time, those last, but not least two enjoyed all "economics of scale" of the world. MIPS was slower clock-frequency-wise than competitive offerings from Intel and/or Motorola and better pipeline design of MIPS did not add much. Complex expensive workstation like IRIS used proprietary hardware to boost I/O bandwidth and/or to have several CPUs working in parallel. It was easier for SGI to make CPUs and other hardware around them in accord and I honestly think that Symbolics was able to pull something like that.