One point of intersection between Bill Gropp and me is the dear, late, and great Hormozd Gahvari, who was a classmate of mine at Berkeley before leaving to do his Ph.D. at UIUC under Bill. In 2010, Hormozd and Bill published a paper at IPDPS, one that I continually return to as I reflect on prior supercomputer architectures and wonder about their future. ("Wonder" here meaning in the admittedly cartoon-ish way an algorithmic person, as opposed to a systems person, does.) In this talk, I'll reflect on their work and trace how its ideas shaped my own research and views on the machines we have built, the ones we seem likely to build, and what we leave "on the table" when we pursue designs that favor one class of systems over others.