Cerebras have special techniques to work around etching errors / bad cores on their wafers. This is possible since their wafers are effectively hundreds of identical copies of redundant cores. Can't do that for a globally unique model.
Etching failure in that situation would be like brain-damage in a human, all sorts of weird effects would start appearing.
Etching failure in that situation would be like brain-damage in a human, all sorts of weird effects would start appearing.