Kerr has always been a very open-minded manager. If you can play really well on the team, you can even stay in the starting line for a long time, even if you're a two-way contract player or even a fringe player. Kerr has been using Post as a starting center in recent times, and he has been playing a lot of time during this time. And since Post's activation, he is currently averaging 8.2 points per game with the Warriors and shooting 41% from three-point range, which is why the Warriors signed him to a two-year contract some time ago.
Post is a very good player who takes chances. In his first game of playing time, he showed his projection ability and attracted the manager. Because no one on the Warriors' current interior line has the qualities he has, neither Looney nor Jackson Davis Jr. have the ability to shoot beyond the three-point line. Post's shooting ability from beyond the three-point line is what he does best. It is precisely because of this trait that the Warriors' tactical system is more abundant. He can open up space to attract opposing centers to the three-point line, giving the rest of the Warriors more room to break through.
So now Kerr has become a little obsessed with Post, so much so that one of the center players on the current Warriors roster has been abandoned by Kerr, and he is Jackson Davis Jr., who used to start for the Warriors. Jackson Davis Jr. is currently only playing in garbage time in these games. He doesn't have great outside shooting compared to Post, and he doesn't have great screen quality and rebounding ability compared to Looney. So that's why he's been deprecated. He's an interior player who isn't very tall, and his shooting skills are almost non-existent.
The Warriors had been rumored to trade Vucevic some time ago, but it has now been abandoned. If Post can be more consistent in his shooting from beyond the three-point line in the future, the Warriors can use Post with confidence, after all, he is younger than Vucevich, and seems to have stronger rim protection ability, including his movement speed is also incomparable to Vucevic, he just lacks more game experience. The Warriors signed Post to a two-year contract with a team option for the second year, which is enough to see how well the Warriors can improve. If he stagnates or declines significantly, the Warriors may not choose to keep him after the end of the season, and he may even sign a long-term contract with the Warriors in the future.