Old White Men

In the past 3 years I have been to several concerts by bands that were "in" when I was in my twenties and thirties or to see other performers, who are my parents' age or older by now. Some of them are remarkably fit and still have a strong voice. With others, you get a rush of nostalgia mixed with pity as you are pretty certain that this is likely the last time you will ever see them live.
Moreover, they are on average 25 years older than me and it also makes me wonder - while, obviously I'm not a performing artist - when I will enter that stage of people finding me low-key cringe and wishing I would stop whatever I was doing. As long as I will be able to read the room and find out myself, it's okay, but otherwise I might have to ask for (not so?) subtle signals...