I haven’t really read studies, and not trying to play doctor, but I’d imagine more so than the narrative that it’s the “max effort” stuff, I’d think it probably has more to do with kids playing competitive travel bb starting from 6, often multiple travel teams at the same time, especially the kids with ML talent. And theres no other game changer even close to a SP in the 6u-18u world. You want them in all the big games