That's way too wasteful. Take a look at https://fuse.wikichip.org/news/3010/a-look-at-cerebras-wafer-scale-engine-half-square-foot-silicon-chip/2/ https://fuse

That's way too wasteful. Take a look at https://fuse.wikichip.org/news/3010/a-look-at-cerebras-wafer-scale-engine-half-square-foot-silicon-chip/2/ https://fuse.wikichip.org/news/3010/a-look-at-cerebras-wafer... and specifically the diagram https://fuse.wikichip.org/wp-content/uploads/2019/11/hc31-cerebras-mem-yield.png https://fuse.wikichip.org/wp-content/uploads/2019/11/hc31-ce... The fabric can effectively route signals diagonally to work around an individual defective core, with a displacement of one position for cores in the same row from that defect over to the nearest spare core. That's how they get away with a claimed "1–1.5%" of spare cores.