There are other problems there like mixed signal work, higher voltages, etc. that make it hard to use the smaller nodes. Especially the FinFET ones for classic

There are other problems there like mixed signal work, higher voltages, etc. that make it hard to use the smaller nodes. Especially the FinFET ones for classic microcontroller uses. And the bond wire problem you point out is also real; these designs will then become severely limited by core size and not the size of the padring. But the advantage will be, ridiculously high yields. That’s why 28nm is such a sweet spot - you are still on bulk silicon, but the frequencies are great and the yield is massive for tiny chips.