Quite a few (if any), I'm afraid. So few that I would not suggest any reasonable examples. Performance in the majority of human activities is rapidly getting so

Quite a few (if any), I'm afraid. So few that I would not suggest any reasonable examples. Performance in the majority of human activities is rapidly getting so upscale that you need both to be exceptionally gifted (both mentally and physically) and begin no later than other competitors in the field. Also, two issues come to my mind: 1) Why do you need to compete at the world level? and 2) It's somewhat worrying if one is in 30s and still looking for their hobbies/skills to pick.