For those of us unfamiliar with the numbers, what do typical yields look like on silicon wafers?
Samsung 3nm had a yield rate well below 20% back in early 2022, and that's not unheard of while still in the development phase. To be economically viable the yield rates have to be around 80%, so mature nodes can be expected to be in that ballpark.
It's still a failure to produce a part that matches the full design.