a couple related terms: skill corridor, or competency plateaus, exist when a community both fails to cultivate newbies (creating a skill floor) and brain drain as people above a certain skill ceiling tend to leave as they have better opportunities available.
a couple related terms: skill corridor, or competency plateaus, exist when a community both fails to cultivate newbies (creating a skill floor) and brain drain as people above a certain skill ceiling tend to leave as they have better opportunities available.