Wow this awesome scientific work needs to be published in Nature right now!Maybe. But there's no way to prove that this is the reason. The only way to prove he still is capable of creating masterpieces is... well, to create a masterpiece.
Look, there are some things at which you get better as you age and some things that you get worse at. That goes the other way around too. There's nothing wrong with accepting the weaknesses and strengths of your current age. Ageism is when you're using someone's age to justify their exclusion from something or to criticize them or belittle their abilities (that applies to all ages). Note that I never said that one can't create once -or before- they reach a certain age, I just argued that the average person's most productive and creative years are between the ages of 20 and 40. Most people are able to be creative also while they are outside those loosely defined boundaries, but their peak, on average, will be during those years. May I remind you how much better Spielberg, Lucas and Cameron were in their early years?
I already talked about scientists, so take musicians for example. Bands, singers, songwriters. The vast majority of non-scholar musicians have created their best works during their 20's and 30's. The same goes for writers. If you look up most classic pieces of literature, you will unsurprisingly find that most of them were written when their authors were young. Harper Lee died a few months ago. You may know her as the author of "To Kill a Mockingbird", which she wrote when she was 30-something. She died at age 89. Jane Austen wrote "Pride and Prejudice", her most famous novel, when she was 21. Herman Melville wrote "Moby-Dick" at 32. Alcott wrote "Little Women" when she was 36. Mary Shelley was 21 when she wrote "Frankenstein" (she died aged 53). Shakespeare died at 52 years of age, but he produced most of his best and best known works before his mid-40's. Dickens wrote most of his works between the ages of 25 and 48. Golding wrote "Lord of the Files" when he was 43. I could go on for hours. The point is that most people are more creative when they are younger. It's not only a matter of opinion, it's scientifically established too and the reasons behind it are very well understood and they are both sociological and biological in nature.
Maybe JVC is one of the rare exceptions. But his track record after the end of the 90's doesn't support this notion; at least not for the time being. I would be glad to be proven wrong by JVC but this requires a game.
I think C.S. Lewis (Wrote Narnia at 51 to 56), Steven King (69 and still going strong), Tolkien (Wrote Lord of the Rings at 45 to 57) and many many others disagree with you.
I agree that some people peek but it has NOTHING to with age!
The funny thing is that is that if you had referred to his gender, race or other irrelevant thing like eye color you would have been kicked out of this forum. Instead we lost Baronus - our loss in my humble opinion :-(