I don't like GSW anymore than anyone else, but they are worlds better than any of those teams from the 80's and 90's. Obviously they'd have to change some things defensively if you're playing old rules, but movement, their shooting and ability to ISO with an extremely long Durant when they want to makes it impossible for any of those old teams to defend them effectively.
Even if you have Pippen on the Butler (still giving up a lot of length) and Jordan on Staph (who barely needs space to shoot), that leaves Klay Thompson to be guarded by Ron Harper and/or Steve Kerr. LMAO. Plus with Gaymond on the perimeter half the time, Rodman either wastes time guarding Iggy/Looney and Luke Longley is out on the perimeter where even Gaymond can blow by him to set someone else up, or Rodman is far from the basket on defense. And then how do they outscore GS? Jordan going for 60 every game? Anyone think Pippen is putting up great numbers against KD? Who else on that team would even be able to consistently get their shot off? Watch those old 90's games. Guys like Kerr/Kukoc are always open because defenses still thought giving up 3's was smart. That's not happening against GSW.
This is the best team ever constructed (with Durant) and I don't think it's particularly close. They were better last year with Durant hungry and the rest of them pissed about the previous Finals (plus their bench was better last year), but we have never seen talent like this on one team. Ever. Just too many great shooters with enough interior defense to make a difference.