This essay is for people who, in web years, are older than dirt. More specifically, if there was a period of time in which you programmed in a language which did not have garbage collection, then I mean you. For most people these days, that means that you had some experience with a language named C.
It is a pretty safe bet that -- despite your deep technical background -- you find that you have some genetic defect that makes it completely impossible for you to understand articles with titles like Continuations Made Simple and Illustrated. And for some reason, that bothers you.