1. Access to information regarding training, reference examples and standards has increased at the general public level exponentially from the years 2000-2024 inclusive. An elementary school child in 2009 no longer needed a dad or a highschool coach with a T&F news subscription to be drawn into the sport, it was at the end of a computer mouse.
2. MORE of the general population better educated and/or inspired regarding running, expectations and opportunities.
3. As previously stated, MORE of the general population in adolescence achieving higher standards in running as a result.
4. MORE of the adolescent population qualifying for NCAA opportunities than previously, allowing MORE higher caliber athletes to enter the system and push the standard. Josh Kerr is an example of an academically below average (by his own admission) individual that would not have been given post-secondary opportunity in the UK. In the 2000-2009 era I would strongly argue he would not have been remotely as aware or capable of triggering the opportunity to run D1, comparatively to how supportive and in-demand that recruitment process had become by 2015 and beyond.