This is all the better reason to trade Bradley now! He's having a career season. Thomas should be shuttled out of town ASAP as well while the damage is only 3 games over .500. This is a treadmill team as currently constructed. They are stuck in that 39-42 win range. If they embrace the tank for one more year they can have TWO lottery picks in a really good draft. Otherwise this team is going to be looking up to the Sixers in the division for the next decade or so especially if they get the next LeBron, Simmons.
If you think Celtics are a 39-42 win team as currently constructed you are kidding yourself and have not been watching them play. Even knee-jerk reaction after the 3 game skid we were over .500 with a very winnable stretch in front of us. Put your money where your mouth is if you think we're that bad because you'd get decent odds on under 42.5 wins at this point.
I predicted 43-39 this year and I don't think I'll be too far off. I hope I am (on the low side) but I'm not seeing anything that suggests the Cs are a 50 win team.
With that said, the difference between me and the mouth breather you replied to is that I don't think the Cs are "stuck" at all. This team is very young. The statistical peak for NBA players is 24-27 years old. The key long-term cogs on the Cs are:
Bradley - 25
Sully - 23
KO - 24
IT - 26 (almost 27)
Smart - 21
Crowder - 25
...and their draftees this year are 22 (Hunter), 21 (Rozier) and 21 (Mickey).
There's not a one of them past peak and most aren't even into their peak range yet. Thus it is reasonable to expect that many of these players will improve their games while none - perhaps with the exception of IT - should actually decline the next 2 years unless their is a serious injury (which you can't forecast).
Also, this core has played together less than a year. Continuity and consistency matter which is why older teams tend to win Championships. It's not because they're getting better as individual players but they grow better as a team. This group hasn't yet had that opportunity.
So just on the basis of these two points alone it is reasonable to expect the Cs to improve. Now can this group be a Championship team? I don't think so. But then again this team isn't done adding pieces. Most teams that get into this scenario have only FA - with historically a tighter cap - and late round picks from which to improve. The Cs have a tremendous amount of picks including the lowly Nets' pick for the next 3 seasons plus abundant cap space.
Stuck? The Cs are about as far away from stuck as they could be. No team in the NBA has more options than they do.