Special thanks to the many people who have greatly influenced my thinking and provided feedback to various versions of this article: Nick Naraghi, Aaron Soskin, David Ehrlichman, Jon Hillis, Ven Gist, Tracheopteryx, David Phelps, Kames Cox-Gheraghty, Nich Kesonpat, Travis Wyche, Tae, Christian Lemp, Joshua Tan, Kevin Seigler, Chase Chapman, Marcus Phillips, Stefen Deleveaux, earth2travis, Daniel Ospina, Lane Rettig, Richard Bartlett.