Its good see. The progression is happening quick. The depth and quality is mindboggling.
The internet in the late 90's transformed the sport.
Athletes now know who they are racing. Results are available, seed sheets are available.
Coaching is better and proven methods are available for all to see.
Smart watches are available
Athletes are more knowledgeable can communicate with each other. Colleges are much more visible.
There are more youth and middle school programs. Parents who ran themselves are more numerous.
Nutrition is different
The tracks are faster
States have gradually made changes to schedules (less duel meets)
Shoe companies have provided good opportunities for kids to market themselves against strong competition.
There are many meets streamed.
The new shoes help. Ten years ago I would laugh if someone said such improvements from shoes.
One meet would make the meet even more competitive. Perhaps a media outlet could pay large sums to have one national championships.