Man, it's been a while, huh. Now I understand why other good fanfics have been discontinued, simply for various of reasons. Mine was simply 3.
1. I lost my muse to continue this story.
2. I have a career and other hobbies to focus on.
3. I have a new passion for other fanfiction.
Again, I'm sorry that after so long of waiting, this is not exactly what you wanted to see when you got the alert of a new chapter.
No words can express how truly sorry I am for leaving some works unfinished, despite of their continuous popularity over the years.