At what point did you stop considering Chicago Fire a great show? (When did you most of your excitement when watching go away)?

When I first watched the show, I got hooked. Seasons 1 and 2 had to be some of the best TV I have ever seen. It went down a little bit in Season 3 but that was still a great season. To this day, I enjoy the stories each episode puts out. Season 8 was the only season I didn't enjoy.Thinking about the OG losses over the years, it's incredible that the episodes are still watchable. Tbh, this show never had the biggest-named actors so it's longevity should be a testament to their work. I ask this question, because I recall seeing fans talking highly of the later seasons. So, when did it peak and eventually fall a little off for you?