Could also be Kirkendall voids, rather than simple electromigration. If so these would not be digital “design” flaws so much as old fashioned analog real-world problems in chemistry, metallurgy. thermodynamics and condensed matter physics. For those who believe that “technology” begins and ends with ones and zeros this might come as a shock. Best way to visualize it is like this: Let’s say you are hungry, really hungry. Let’s say you’d really, really like a ham sandwich. Let’s say you’re searching the internet on your extremely smart phone (the people who sold it to your are extremely smart, they make a lot of money off of you) for pictures and descriptions and recipes and restaruants and ingredients for ham sandwiches. Let’s say though that you don’t ever actually get to EAT that delicious ham sandwich until you actually put down the phone and go hunt yourself up a physical, *not a digital*, ham sandwich. Let’s say this works for vegan quinoia too, but not nearly so satisfyingly. Moral of the story: there is more inside your digits than inside your digital. Your cellphone is your cell and you didn’t even notice it happening.
As William F. Buckley once said of a highly hypothetical argument, “If we had some bread, we could make a nice ham sandwich, if we had some ham.”