The NBA has never had competitive balance.
^^^This^^^
All of this talk about competitive balance is pretty hilarious, imo. The NBA has always been a league where 2-4 teams have a shot at the title and everyone else is playing catch up.
The only thing that has changed is that now the 2-4 teams aren't the ones that we are used to seeing.
The best thing about the NBA (and the sport of basketball in general) is also the worst thing about it. 1 guy can literally make or break a team.
It's why a team can be in the lottery 1 season and in the finals the next. It's also why the NBA typically has the most interesting off season of all of the major sports.