One-and-done teams and players are a staple of college basketball and have been for a number of years now. The college experience is now all about improving your star brand and getting to the NBA as quickly as possible. Sometimes that works well for a player and other times they rush into the NBA Draft and struggle to make an impact.
NBA teams, on the other hand, rarely enter the realms of one-and-done territory, opting to meticulously build their teams from the ground up until continued success is a viable option as opposed to an unconscious pipedream.
Occasionally, though, the stars align.