This was my first thought. I think beginners take better to volume but eventually we all hit a wall that takes more deliberate practice and deep reflection. Eve

This was my first thought. I think beginners take better to volume but eventually we all hit a wall that takes more deliberate practice and deep reflection. Even then some concepts will be out of reach or take an exceptional teacher to break down. That doesn't even touch on the limits of individual abilities which we all face at some point.