I've known Johnny Depp since I was 19.
I find that the skills and the muscularity required to be on stage, you need to keep those up - I do, personally, in order to maintain your ability to perform on screen. You don't want to always be working in the one medium.
As things may turn out in the future, people may (though I doubt it) find that their work gives them all the enjoyment - physical, intellectual or aesthetic - which they may require. That certainly is not so now.
For un-subscribe please check the mail footer.