Intel SCC tried the extreme version of that. Though you could argue their Message Passing Buffers weren't shaped quite right (too small, hard for OS to use acro

Intel SCC tried the extreme version of that. Though you could argue their Message Passing Buffers weren't shaped quite right (too small, hard for OS to use across trust domains). https://en.wikipedia.org/wiki/Single-chip_Cloud_Computer https://en.wikipedia.org/wiki/Single-chip_Cloud_Computer You could also take a half-step in that direction with the DEC Alpha processor's extremely relaxed memory consistency model, and see how well things program for that. When I had a chance to poke at them, Alphas were about 2-3x faster than Intels, with much less ecosystem optimization effort burned -- and most software worked just fine.