And in other cases certain 1/8" chains are stronger than others, making the original "problem" even less relevant.

When comparing two chains made the exact same way, one being 3/32" and the other 1/8" - like the KMC K810SL and K170SL for example - the only actual difference between them is the pins are shorter on the 3/32" version. The plates are the same thickness and I would bet one is just as "strong" as the other.