I wonder just how long lambourne has had this fixation with teeth and gums? I suppose he'll be quite happy to be referred to as a 'gummer' when he passes 60, assuming he passes 60 of course.
The issue is not the number of years attached to your CV, it is simply your ability to do the job required. If your health and mental dexterity are adequate to perform the task, then get on with it.
I'm quite certain that there are stastistics to show that suffering a heart attack at the controls of your aircraft age 60+ is no more likely than the F/O collapsing of a stroke or acute food poisoning, hence the raising of the retirement age.
If bile is a requirement for a happy and fulfilling life in the RHS of lambourne's airline then he should continue to enjoy his work well into his 60s.
I'm glad I don't have to fly anywhere withing the USA if the guy doing the poling is in that state of mind when he's sat alongside a 'gummer'.