As you get older you do get better because the expression of yourself in all aspects of your life means that you have the freedom to make your own rules, discover your own rhythm and pace your life the way it suits you. Getting older means that you see yourself as the actual person you are, warts and all, always ready to be willing and wiser.
I once managed a guy named Tim (name changed). His work was strong and I considered him a key player on our team. But I noticed shortly after his two-year review that he was losing steam. His work was barely making it in on time, he was less collaborative in meetings, and folks were starting to wonder whether he was on his way out.