I am a busy person and I'm sometimes called away from home unexpectedly for short or extended periods. This is necessary to eat. For that reason, although I may intend to write and post multi-chapter stories, I will probably mark them as complete. I would rather do it that way than annoy the reader with expectations that I may not be able to meet.
If you like a particular story and want to read additional chapters if and when they are available, then simply favorite that story and you'll be notified when it updates. It isn't difficult and it will help both of us, I think. If you have a different opinion, I'm very happy to listen and consider all points of view. It's how we get things done in this country...or used to, anyway.