Waiting For An Improvement?

Interesting to read an article, challenging the assumption that ageing is inevitably a process of cognitive and physical decline. Apparently, there are lots of 'personal bests' to look forward to post 40. Maturing folk alledgedly can expect, at defined ages, to do better at ultramarathons, chess, dressage, receiving a Nobel Prize etc., etc. (https://www.theguardian.com/science/2023/sep/19/never-past-your-prime-13-peaks-we-reach-at-40-or-later). I read the article to the end avidly. Sadly, the only remaining 'peak' I can apparently look forward to, is being 'happy'. This is based on a telephone survey of Americans, who claimed to be at their happiest when they reached 82! I'm not American and also deeply suspicious of 'happy'. Surely, 'happy can just mean you've lost all ability to understand what's happening to you and the world around you? You may also have forgotten just how slow you really are. Another possibility is that only unusually spritely 82 year old Americans, made it to the 'phone, before it stopped ringing. Unhappy old folk didn't get there!