I agree with the article about luck and context. The world changed, your brand, product, or philosophy may be come less relevant or regarded over time, or faces greater competition.
But part of the death of genius is certainly in rooted in the person. A number of pitfalls in that direction to which we can relate. I think a major one is believing in your own hype, decreasing your ability to reject bad ideas. Also success can dim the the fire inside that had something to prove, and by caring less, settle for less. Also, for certain types of genius, it may have depended on peak working memory, and that declines with age. Last, I think knowledge of the world dims certain types of genius. I think melodic genius is particularly vulnerable to having heard and played too much music previously. Patterns get built up in your mind, and when trying to write music, at least for me, not only am I more likely to travel down the same worn melodic paths, but if I do discover some interesting turn of melodic phrase, I am more likely to recall some bit of music that I've heard, and go "ahh.. its one of these" and suddenly its hard for it to take its own path, and you are comparing it to what was written before....which kinda kills a moment of inspiration.
But part of the death of genius is certainly in rooted in the person. A number of pitfalls in that direction to which we can relate. I think a major one is believing in your own hype, decreasing your ability to reject bad ideas. Also success can dim the the fire inside that had something to prove, and by caring less, settle for less. Also, for certain types of genius, it may have depended on peak working memory, and that declines with age. Last, I think knowledge of the world dims certain types of genius. I think melodic genius is particularly vulnerable to having heard and played too much music previously. Patterns get built up in your mind, and when trying to write music, at least for me, not only am I more likely to travel down the same worn melodic paths, but if I do discover some interesting turn of melodic phrase, I am more likely to recall some bit of music that I've heard, and go "ahh.. its one of these" and suddenly its hard for it to take its own path, and you are comparing it to what was written before....which kinda kills a moment of inspiration.