If you look at what is going on with Olympic qualifying you can see that the road runners that are used to high stack shoes like Vaporflies are not having as much success on the track. Mo Farah, Galen Rupp, Sara Hall and many others. Now hobby joggers run faster on the roads over 5k and 10k in Vaporflies than on the track in flats. Should be a lesson for up and coming track athletes.