It didn’t get very serious, but around 1981 or so, the NBA considered dumping some of its weak sister teams. The idea was that by putting down some chronically struggling teams that seemed to have largely zero hope of ever getting better, the NBA would gain overall strength, especially by concentrating talent on the remaining teams. Needless to say, the union was not thrilled about this idea and it didn't go anywhere.
The teams scheduled for folding, some of which subsequently became model teams, were the San Diego Clippers, Utah Jazz, Kansas City Kings, Cleveland Cavaliers, Indiana Pacers, Atlanta Hawks, and New Jersey Nets. None of these teams drew. Most of them were mediocre to horrible on the floor. Many of them were on the brink of folding anyway.
The NBA then would have looked like this.
New York Knicks
San Antonio Spurs
Golden State Warriors
Los Angeles Lakers
I think that would have been a terrific move if the league had done that.