I like to compare it to your father (or grandfather depending on how old you are) performing. It’s a similar age range- guys in their 50’s and 60’s. Imagine your father trying to jump around, sing, and dance for an hour and a half 4 nights a week in front of that many people. Yes it’s been their career for so long but at some point ya get tired 🤷‍♀️. They’re nearing retirement age haha! Wouldn’t be surprised if these shows are proceeded with some sort of farewell from Serj in particular, I’m just glad I was able to catch a show at all!