I don't care what era you play in. If you play an 82 game schedule and end up winning 91.5% of your games (75-7), you're one of the great sports teams in history. All time great. Period.
If you win the title.
If you don't, you just go down in the annals as a great regular season team but didn't win the title.
Yeah, we can fuss around about who'd beat who all we want, but ignore the hypotheticals about who's the absolute #1 squad ever and we're probably looking at a historically great team by any measure. If they win the ring of course.
Also, lol at the people claiming the league is more watered down today than in the mid-80s. Here's the final standings for 85-86: http://www.basketball-reference.com/leagues/NBA_1986.html
Take a look at the standings and then the rosters of the teams outside of the elite. The league was tremendously top-heavy; there were no truly terrible teams but the middle and bottom of the league was weak across the board - only 10 out of 23 teams cracked .500. Most of the next generation of stars (Jordan, Malone, Ewing) were just starting out and not ready to lead a winner yet. There was very little competition for the top few squads.
Yep. and Boston had a pretty easy run to the title. Got 30 win Chicago in the first round. That was the year Jordan only played in 18 games (though he was around for the playoffs). Played the Hawks, which was pretty much Nique and a bunch of role players. Then played the Bucks, who are a bunch of good players, but no great ones (and Moncrief missed a bunch of playoff games and wasn't fully healthy). Then ended up with the Dream/Sampson Rockets who had no one else.
the 80's was by and large the Celtics and Lakers, with the Sixers in the first half and the Pistons in the 2nd half of the decade. Then there were a bunch of teams that had a great player and not much else (i.e. Hawks, Bulls, Spurs, Knicks, Rockets, Jazz), teams that were fairly solid without any real stars (i.e. Bucks, Suns, Nuggets), and then just a bunch of crap (i.e. Pacers, Warrios, Kings).
the early 90's is when a lot of those one star team put it together and became really good as you still had the three old guard, but saw the rise of the Bulls, Sonics, Blazers, Suns, etc. Then there was some expansion which took a few years to even out, but by the mid-2000's the league was back in peak form and has pretty remained there.
This year the Cavs, Spurs, and Warriors are all elite teams and would compete well with all the great teams in history. If the Thunder get healthy and actually stay that way, you might even be able to put them into that category as well. The Clippers, Bulls, and Heat are all good teams and would be good teams in any decade in the sport (you know the type of team that could knock off an elite team in the playoffs, but probably aren't a true title contender).