White has All-Star potential in a way that anyone who doesn't show that much ceiling but theoretically still has time for unreal gains does. Meaning that I don't think it's reasonable to argue he has that kind of ceiling, but it's technically not impossible, so whatever. You don't start guys to "find out what ceiling they have". You give them playing time, sure. But the Spurs are in the business of winning games right now. They aren't looking for boom-or-bust moves. White coming in and showing he's a steady player is a requirement to showing he's a steady starter. Forbes has been a steady player this year. Consistency is underrated. When the alternative is White still getting playing time, any perceived difference in upside isn't enough to warrant a change in the starting back court.