After about a decade of data, I think the community/e-sports results in Dota generally show: 1. In some roles and metas, the split second mechanical difference

After about a decade of data, I think the community/e-sports results in Dota generally show: 1. In some roles and metas, the split second mechanical difference does matter i.e. for carries or mid-lane playmakers under specific metas and specific matchups. Although some metas are less mechanically deep for certain roles -- I know part of the theory for Dendi's decline is that his mechanical skill was overkill when denies in midlane (very timing based mechanic) became less important compared to macrostrategy (meaning that he couldn't just 'out skill' opponents and win the game with an early lead). 2. But, the experience gains from being in competitions for a long time make the older players a great fit for coaching, captain, and support roles. 3. But another factor is less reaction time and more that the late 20s and early 30s players have spouses and more expansive lives beyond the game, so they simply cannot spend the 100+ hours a week perfectly tuning the midlane or hard carry meta where the fundamentals can change really fast. Also, for the most successful players (read: millionaires) they want to enjoy their wealth and do things outside the game.