This loop of strike zone over time shows how much better umpiring has become:
2025 is incredibly good compared with 2007. When you look at 2025 you can barely see any room for improvement at all -- it looks like too many middle-height pitches off the plate get called strikes and too many pitches in the far, far corners get called balls. But other than that the challenge system is really about catching egregious, outlier misses. All evidence suggests that the immediate feedback of the challenge system makes umpiring even better, so 2026 will have even less misses than 2025.