I came to realize that exaggerated concern about what others are doing can be foolish. It can paralyze effort, and stifle a good idea. One finds that in the history of science, almost every problem has been worked out by someone else. This should not discourage anyone from pursuing his own path.
I play with my grandchildren. I tend to my garden, which I love. Of course, I love to read, and family is really what it's all about.