Hi, I'm the author. I'm not intending to describe working in sprints. You can implement the ideas behind this article with sprints, kanban, or something else entirely. Using sprints doesn't do what using milestones does.

So what I'm hearing is that that wasn't clear. Since a few people said that here, I'll make some edits to clarify. If you have any suggestions as to where the confusion is, I'd love to hear it. Thank you!