The 10,000-hour rule, popularized by Malcolm Gladwell, states that becoming an expert in any field requires extensive practice and repetition.
However, David Epstein presents a contra-argument, stating that the 10,000 hours of practice work best in simple fields with immediate feedback and clear goals.
Comparing oneself to younger individuals and progressing at one's own pace is more helpful rather than feeling stuck in unfulfilling careers or life paths.
To expand one's horizons, it is encouraged to explore interests in other domains.