Malcolm Young of AC/DC is suffering from dementia and won't be returning to the band. His family confirmed this in a statement to the US magazine People. He's sixty-one.
Glen Campbell recently announced that he was suffering from Alzheimer's. He's seventy-eight.
Sneaky Pete Kleinow of the Flying Burrito Brothers died from an Alzheimer's related condition in 2007. He was seventy-two.
There are no doubt lots more we don't know about. Famous rockers of the past who have stopped touring because they can no longer handle it. Most of the time it won't be announced.
Although it's none of our business I suppose we should be grateful for the few whose families have chosen to make their conditions public.
Nobody would have predicted that rock musicians would ever succumb to an age-related condition. Nobody would ever have imagined them going on as long as they have done.
We grew up with these acts and we were used to them getting to every experience before we did. This latest one is the saddest.