People call it a robotic umpire, but it’s a combination of radar guns, cameras, and computers.
The system gathers up all the data and tells the guy behind the plate if it’s a strike or a ball.
It doesn’t scan whether a swing goes around.
It doesn’t judge foul tips.
It doesn’t call safe or out on bases, foul or fair balls, or other important calls that umpires mess up.
Nor does it sue the league for accusations of racism because it gets passed up for promoton.
Which is why it’s still in the minor leagues, calling balls and strikes.