The vaunted 10,000 hours are necessary to become globally competitive at some rivalrous activity where others are striving to be the best. It's woefully insuff

The vaunted 10,000 hours are necessary to become globally competitive at some rivalrous activity where others are striving to be the best. It's woefully insufficient for such success, one also needs 'talent', which is a fuzzy but real measure of the inherent ability one has. So it's probably too late for golf and concert piano, these might make great hobbies, but you won't be playing the Masters or Carnegie Hall. Very likely, it wouldn't have mattered when you started, or how hard you worked, for those goals. Maybe you've got what it takes, but most people don't, so it's accordingly unlikely. That leaves almost everything else. If you're in good health, have the hustle and drive, why not? 43 is about median for successful new business founders, YN demographics notwithstanding.