Recording wise , the record companies will make that decision ?
As for touring I assume the love of the limelight and a need to pay bills pushes them on when probably a lot should have called it a day , a lot of our artists are at least in their seventies and I know lots of people who can hardly walk at that age so more power to the singers who keep going .
The artists who turn up at say the Weekenders probably feel what the f**k I will give it a go , a lot may have not performed for years, so maybe a little slack should be given.