Learning IS brain transformation. Essentially by definition. Also, lack of exposure to novel intense experience actively prevents brain development because it prevents learning. This will be a growing problem as adolescents in particular lead lives which are designed to eliminate all novel stimulus and thwart every natural inclination to seek novelty. It's certainly encouraging news to see that the dropoff in neuroplasticity that comes later might be caused by the dead boring lives of industrialized adults rather than any insurmountable biological hurdle. At least, that's what I get out of this.