I should think that depends on the nature of the work and the definition of retiring, Mr Lightfoot is lucky that he has been able to spend a lifetime working and making a living doing something that is an extension of his natural talent. In that respect he is luckier than most of us, and as long as he remains healthy and the voice doesn’t deteriorate any further, he can continue doing so. Many people have very physically or mentally exhausting work, others hate their jobs their entire lives ...all of these groups generally look forward to retirement, in some cases taking early retirement if funds allow it, in order to take up some long cherished desire to follow a different path or even just to pursue a hobby or to travel. That is really not retiring, that is just exchanging something that was a drudge for something that is a joy to get up for each day.