> Most systems change all the time. The way I think of it is "wizardry" has good initial velocity (as it relates to change), but velocity decreases with time,

> Most systems change all the time. The way I think of it is "wizardry" has good initial velocity (as it relates to change), but velocity decreases with time, whereas for "engineering" velocity is terrible at first (initial investment), improves a bit over time, but most importantly it settles to a constant level. Engineering is O(log(n)), wizardry is O(N*N).