What? Between 2000-2010 (11 seasons) no team had an average point differential of -10 or greater. Between 2011-2012 (3 years) it has happened twice. it is not like the NBA added expansion teams.
Championship parity has never happened in the modern NBA. The difference between the top teams and the bottom teams has grown in the last few years. The bottom teams now are horrible, and there are more of them. I could see two teams having a -10 average this season. I am not even sure when that happened last. If you watch multiple games a night and have been for the last ~10 years you you will have noticed a difference.
Also this 1 game has nothing to do with what happened last season, to be hones the last few seasons.
I think short term memory is affecting you and you're using one stat to prove you're correct. Point differential. If you're going to use that, then I guess you're okay with a team losing 70 games (2010 Nets) but because their point differential wasn't bad, its okay right? The Sixers had that -10 point differential last year, yet they still won 19 games. They won more games than the 2010 Nets, 2005 Hawks, 2000 Clippers, 2001 Bulls, 2008 Heat, 2010 TWolves, 2000 Bulls, 2001 Warriros, 2003 Nuggets, 2003 Cavs, 2009 Kings, 2005 Hornets, and the 2005 Bobcats.
The lockout year the Bobcats put up the worst winning % in NBA history. They were one sorry ass team and given they could possibly be the worst NBA team in history, they should have had a point differential of -10 or greater.
You also ignore the 90's where that kind of point differential happened all the time to really bad teams.
Also, what do you care what the bottom feeder teams do? The Sixers for example WANT to suck. They want to acquire several lottery picks multiple years in a row in hopes that it'll build a champion contender. Its a strategy for building a team.
But, I don't disagree that the difference between the top teams and bottom teams has grown in recent years. The Heat got together, the Bulls lost Rose and the Celtics got old. Not sure what you were expecting out of the eastern conference. Meanwhile the West is a battle field. The Spurs and Thunder are even on a competition level as the Clippers, Blazers, Rockets aren't bad themselves. Key in Dallas may rise up again this season and there is plenty of competition in the West. Its the East that has a problem. A lot of that is fueled by LeBron. If LeBron didn't become GM of the Cavs and they didn't trade for Love, the East would be more on a parity level.