Well I'm not one to tell people when they're too old for something. I did my first Glastonbury in 2017 at the age of 64, this will be my fourth and I'll be there for 9 days working in the Oxfam shop traipsing back and forth from the Oxfield to the Park, and I'm as excited as a kid at Christmas.
I know somebody who did his first in 2019 at the age of 68, this will be his third and he flies in from the USA.
You're too old when, for whatever reason, you're no longer enjoying it and have stopped dancing.