I was looking up, "When are people not considered young anymore?", when I found this.
61 - 80ff Senior. Not necessarily old but you probably have grandchildren who think you're old. You may not be the fastest or badest, but your insurance is usually cheaper. This is around when most people think you're old.
When I get to that age I'll remember, "Hey, I'm not fucking old! My insurance is just cheap!"
https://arachnoid.com/polysolve/