If the Warriors go on to win the Finals even without KD, then that's a massive hit on Durant's legacy. Then he'd pretty much have to leave and go win a chip with the Knicks or Clippers (as the alpha) if he really wants to be considered the best in the NBA. But right now his move to Golden State already was weak and if the Warriors win it all now even with him out, then boy I don't think it'd matter if KD has 3 rings, because they'd look meaningless to his legacy. I'd even argue the one championship Lebron won for Cleveland holds more weight than any or all of KD's right now.