> Right but it's not like a 4 way stop is going to perform better.

A 4 way stop does perform better than a roundabout given highly disparate traffic volumes, because roundabouts suffer from resource starvation in that scenario, but 4 way stops are starvation-free.

>In the same case you'd expect it to be a 2 way stop

Which is what it was for the first 70yr... And what most of them in this particular neighborhood still are, with a 0-6mo intermission.