How long can the Warriors reign as the most recent repeat champions last?

CLEVELAND, OH - JUNE 08: Kevin Durant #35 and Stephen Curry #30 of the Golden State Warriors celebrate after defeating the Cleveland Cavaliers during Game Four of the 2018 NBA Finals at Quicken Loans Arena on June 8, 2018 in Cleveland, Ohio. The Warriors defeated the Cavaliers 108-85 to win the 2018 NBA Finals. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreemen