The main cast has ongoing stories. That being said 90% of the original main cast left the show. I think only the former chief of surgery, Bailey, and Meredith are left and Meredith's actor is part time. I loved the original cast but as they left I just stopped watching the show.Is this series like law and order where you've got standalone episodes (some multi-parters)
Or
Is this 21 seasons of continuous connected stories