Not very long AFAIC. To me, it started with the bubble year, JJ's first season in charge. We jettisoned all the bad draft picks and started anew.
I'm not against trying to improve this team and if we were just talking 4 picks, 3 pick swaps and filler for Durant I'd be all in even though that alone is fraught with risk. But we're basically talking about immediately turning over the roster, giving up all our future assets, which would leave us with a trio of stars two of whom have expiration dates on the immediate horizon. So we're betting the house that we will roll 7, I just don't like those odds.