When you get a series going, it’s sometimes difficult to put it down and walk away. You always come back to it at some point. There are always revisits, and archive checks from future references, but most of the series articles get wrapped up, and revisitation or extension seems like you’re a bit too obsessed with the subject. The problem comes in when the author is supposedly finished with the subject, but the subject isn’t finished.
In the case of plays, play calling and offenses, the object of the essays was finally removed, and things moved on. However, the “Twilight” series, that merged into “The End” series is the curse that just keeps on giving.