Literally the point of Ericsson. The "D" in "DP" is not just there for decoration. Examples like driving or touch typing are among the most-mentioned examples

Literally the point of Ericsson. The "D" in "DP" is not just there for decoration. Examples like driving or touch typing are among the most-mentioned examples in the literature for skills where people just go to "good enough" and then plateau, because they don't deliberately aim for improvement.